SNVS974B April   2013  – October 2015 LM3630A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C-Compatible Timing Requirements (SCL, SDA)
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Operation
        1. 7.3.1.1  Control Bank Mapping
        2. 7.3.1.2  PWM Input Polaritiy
        3. 7.3.1.3  HWEN Input
        4. 7.3.1.4  SEL Input
        5. 7.3.1.5  INTN Output
        6. 7.3.1.6  Boost Converter
        7. 7.3.1.7  Boost Switching Frequency Select
        8. 7.3.1.8  Adaptive Headroom
        9. 7.3.1.9  Current Sinks
        10. 7.3.1.10 Current String Biasing
        11. 7.3.1.11 Full-Scale LED Current
        12. 7.3.1.12 Brightness Register
        13. 7.3.1.13 Exponential Mapping
        14. 7.3.1.14 Linear Mapping
      2. 7.3.2 Test Features
        1. 7.3.2.1 Open LED String (LED1 And LED2)
        2. 7.3.2.2 Shorted LED String
        3. 7.3.2.3 Overvoltage Protection (Manufacturing Fault Detection and Shutdown)
      3. 7.3.3 Fault Flags/Protection Features
        1. 7.3.3.1 Overvoltage Protection (Inductive Boost Operation)
        2. 7.3.3.2 Current Limit
        3. 7.3.3.3 Thermal Shutdown
      4. 7.3.4 Initialization Timing
        1. 7.3.4.1 Initialization Timing With HWEN Tied to VIN
        2. 7.3.4.2 Initialization Timing With HWEN Driven by GPIO
        3. 7.3.4.3 Initialization After Software Reset
    4. 7.4 Device Functional Modes
      1. 7.4.1 LED Current Ramping
        1. 7.4.1.1 Start-Up/Shutdown Ramp
        2. 7.4.1.2 Run-Time Ramp
      2. 7.4.2 PWM Operation
        1. 7.4.2.1 PWM Input
        2. 7.4.2.2 PWM Input Frequency
        3. 7.4.2.3 Recommended Settings
        4. 7.4.2.4 Adjustments to PWM Sampler
          1. 7.4.2.4.1 Filter Strength, Register 50h Bits [1:0]
          2. 7.4.2.4.2 Hysteresis 1 Bit, Register 05h, Bit 7
          3. 7.4.2.4.3 Lower Bound Disable, Register 05h, Bit 6
        5. 7.4.2.5 Minimum TON Pulse Width
    5. 7.5 Programming
      1. 7.5.1 I2C-Compatible Interface
        1. 7.5.1.1 Data Validity
        2. 7.5.1.2 Start and Stop Conditions
        3. 7.5.1.3 Transferring Data
    6. 7.6 Register Maps
      1. 7.6.1 LM3630A I2C Register Map
      2. 7.6.2 Register Descriptions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inductor Selection
        2. 8.2.2.2 Maximum Power Output
      3. 8.2.3 Application Curves
    3. 8.3 Initialization Setup
      1. 8.3.1 Recommended Initialization Sequence
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Output Capacitor Placement
      2. 10.1.2 Schottky Diode Placement
      3. 10.1.3 Inductor Placement
      4. 10.1.4 Input Capacitor Selection and Placement
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)(2)
MIN MAX UNIT
IN, HWEN, PWM, SCL, SDA, INTN, SEL to GND –0.3 6 V
SW, OVP, ILED1, ILED2 to GND –0.3 45 V
T(J-MAX) Continuous power dissipation(3) Internally limited
Maximum junction temperature 150
Maximum lead temperature (soldering)(4)
Vapor phase (60 sec.)		 215 °C
Maximum lead temperature (soldering)(4)
Infrared (15 sec.)		 220 °C
Storage temperature, Tstg −45 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to the potential at the GND pin.
(3) Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 140°C (typical) and disengages at TJ = 125°C (typical).
(4) For detailed soldering specifications and information, refer to Texas Instruments Application Note 1112: DSBGA Wafer Level Chip Scale Package (SNVA009).

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
VIN Input voltage 2.3 5.5 V
TA Operating ambient temperature −40 85 °C

6.4 Thermal Information

THERMAL METRIC(1) LM3630A UNIT
YFQ (DBSGA)
12 PINS
RθJA Junction-to-ambient thermal resistance 78.1 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

Typical limits are for TA = 25°C; minimum and maximum limits apply over the full operating ambient temperature range (−40°C ≤ TA ≤ 85°C); VIN = 3.6 V, unless otherwise specified.(1)
PARAMETER TEST CONDITION MIN TYP MAX UNIT
ILED1, ILED2 Output current regulation 2.5 V ≤ VIN ≤ 5.5 V, full-scale current = 20 mA 19 20 21 mA
IMATCH ILED1 to ILED2 current matching (2) 2.5 V ≤ VIN ≤ 5.5 V, ILED = 10 mA, TA = 25°C ILED1 on A
ILED2 on B		 –1% 0.5% 1%
2.5 V ≤ VIN ≤ 5.5 V, ILED = 10 mA, 0°C ≤ TA ≤ 70°C –2.5% 0.5% 2.5%
VREG_CS Regulated current sink headroom voltage ILED = 5 mA 250 mV
VHR Current sink minimum headroom voltage ILED = 95% of nominal, ILED = 20 mA 160 240
RDSON NMOS switch on resistance ISW = 100 mA 0.25 Ω
ICL NMOS switch current limit 2.5 V ≤ VIN ≤ 5.5 V 480 600 720 mA
640 800 960
800 1000 1200
960 1200 1440
VOVP Output overvoltage protection ON threshold, 2.3 V ≤ VIN ≤ 5.5 V 24-V option 23 24 25 V
ON threshold, 2.3 V ≤ VIN ≤ 5.5 V 40-V option 39 41 44
Hysteresis 1
ƒSW Switching frequency 2.5 V ≤ VIN ≤ 5.5 V 560-kHz shift = 1 538 560 582 kHz
500-kHz shift = 0 481 500 518
1.12-MHz shift = 1 1077 1120 1163
1-MHz shift = 0 962 1000 1038
DMAX Maximum duty cycle 94%
IQ Quiescent current into device, not switching VIN = 3.6 V ILED1 = ILED2 =
20 mA, feedback disabled.		 350 µA
ISHDN Shutdown current 2.3 V ≤ VIN ≤ 5.5 V HWEN = VIN, I2C shutdown 1 4 µA
HWEN = GND 1 4
ILED_MIN Minimum LED current in ILED1 or ILED2 Full-scale current = 20 mA, BRT = 0x01, Exponential mapping mode 13
TSD Thermal shutdown 140 °C
Hysteresis 15
tWAIT Initialization timing Time period to wait from the assertion of HWEN or after software reset, before an I2C transaction will be ACK'ed. During this time period an I2C transaction will be NAK'ed 1 ms
LOGIC INPUTS (PWM, HWEN, SEL, SCL, SDA)
VIL Input logic low 2.3 V ≤ VIN ≤ 5.5 V 0 0.4 V
VIH Input logic high 2.3 V ≤ VIN ≤ 5.5 V 1.2 VIN
VOL Output logic low (SDA, INTN) 2.3 V ≤ VIN ≤ 5.5 V 400 mV
ƒPWM PWM input frequency 2.3 V ≤ VIN ≤ 5.5 V 10 80 kHz
CIN Input capacitance SDA 4.5 pF
SCL 5
(1) Minimum and maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C.
(2) LED current sink matching between LED1 and LED2 is given by taking the difference between ILED1 and ILED2 and dividing by the sum of ILED1 and ILED2. The formula is (ILED1 − ILED2)/(ILED1 + ILED2) at ILED = 10 mA. ILED1 is driven by Bank A and ILED2 is driven by Bank B.

6.6 I2C-Compatible Timing Requirements (SCL, SDA)

See(1).
MIN NOM MAX UNIT
t1 SCL (clock period) 2.5 µs
t2 Data in setup time to SCL high 100 ns
t3 Data in setup time to SCL low 0
t4 SDA low setup time to SCL low (start) 100
t5 SDA high hold time to SCL high (stop) 100
(1) SCL and SDA must be glitch-free in order for proper brightness to be realized.

6.7 Typical Characteristics

TA = 25°C, ILED full-scale = 20 mA, unless specified otherwise.
LM3630A C057_SNVS974.png
VIN = 2.5 V 2p6s L = 22 µH
Frequency = 500 kHz
Figure 1. Boost and LED Efficiency
LM3630A C059_SNVS974.png
VIN = 3.6 V 2p6s L = 22 µH
Frequency = 500 kHz
Figure 3. Boost and LED Efficiency
LM3630A C061_SNVS974.png
VIN = 5.5 V 2p6s L = 22 µH
Frequency = 500 kHz
Figure 5. Boost and LED Efficiency
LM3630A C004_SNVS974.png
VIN = 2.7 V 2p6s L = 10 µH
Frequency = 500 kHz
Figure 7. Boost and LED Efficiency
LM3630A C006_SNVS974.png
VIN = 4.2 V 2p6s L = 10 µH
Frequency = 500 kHz
Figure 9. Boost and LED Efficiency
LM3630A C008_SNVS974.png
VIN = 2.5 V 1p10s L = 22 µH
Frequency = 500 kHz
Figure 11. Boost and LED Efficiency
LM3630A C010_SNVS974.png
VIN = 3.6 V 1p10s L = 22 µH
Frequency = 500 kHz
Figure 13. Boost and LED Efficiency
LM3630A C012_SNVS974.png
VIN = 5.5 V 1p10s L = 22 µH
Frequency = 500 kHz
Figure 15. Boost and LED Efficiency
LM3630A C014_SNVS974.png
VIN = 2.7 V 1p10s L = 10 µH
Frequency = 500 kHz
Figure 17. Boost and LED Efficiency
LM3630A C016_SNVS974.png
VIN = 4.2 V 1p10s L = 10 µH
Frequency = 500 kHz
Figure 19. Boost and LED Efficiency
LM3630A C018_SNVS974.png
VIN = 2.5 V 2p10s L = 10 µH
Frequency = 1 MHz
Figure 21. Boost and LED Efficiency
LM3630A C020_SNVS974.png
VIN = 3.6 V 2p10s L = 10 µH
Frequency = 1 MHz
Figure 23. Boost and LED Efficiency
LM3630A C022_SNVS974.png
VIN = 5.5 V 2p10s L = 10 µH
Frequency = 1 MHz
Figure 25. Boost and LED Efficiency
LM3630A C024_SNVS974.png
VIN = 3.6 V 2p10s L = 10 µH
Frequency = 500 kHz
Figure 27. Boost and LED Efficiency
LM3630A C026_SNVS974.png
VIN = 5.5 V 2p10s L = 10 µH
Frequency = 500 kHz
Figure 29. Boost and LED Efficiency
LM3630A C030_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 31. PWR_IN Across VIN
LM3630A C032_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 33. IOUT Across VIN
LM3630A C034_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 35. ILED Across VIN
LM3630A C036_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 37. IIN Across VIN
LM3630A C038_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 39. VOUT Across VIN
LM3630A C040_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 41. PWR_OUT Across VIN
LM3630A C042_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 43. I_INDUCTOR Across VIN
LM3630A C044_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 45. PWR_IN Across VIN
LM3630A C046_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 47. IOUT Across VIN
LM3630A C048_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 49. ILED Across VIN
LM3630A C050_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 51. IIN Across VIN
LM3630A C052_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 53. VOUT Across VIN
LM3630A C054_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 55. PWR_OUT Across VIN
LM3630A C056_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 57. I_INDUCTOR Across VIN
LM3630A C066_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 59. PWR_IIN Across VIN
LM3630A C068_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 61. IOUT Across VIN
LM3630A C070_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 63. ILED Across VIN
LM3630A C072_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 65. IIN Across VIN
LM3630A C074_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 67. VOUT Across VIN
LM3630A C076_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 69. PWR_OUT Across VIN
LM3630A C078_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 71. I_INDUCTOR Across VIN
LM3630A C058_SNVS974.png
VIN = 2.7 V 2p6s L = 22 µH
Frequency = 500 kHz
Figure 2. Boost and LED Efficiency
LM3630A C060_SNVS974.png
VIN = 4.2 V 2p6s L = 22 µH
Frequency = 500 kHz
Figure 4. Boost And LED Efficiency
LM3630A C003_SNVS974.png
VIN = 2.5 V 2p6s L = 10 µH
Frequency = 500 kHz
Figure 6. Boost and LED Efficiency
LM3630A C005_SNVS974.png
VIN = 3.6 V 2p6s L = 10 µH
Frequency = 500 kHz
Figure 8. Boost and LED Efficiency
LM3630A C007_SNVS974.png
VIN = 5.5 V 2p6s L = 10 µH
Frequency = 500 kHz
Figure 10. Boost and LED Efficiency
LM3630A C009_SNVS974.png
VIN = 2.7 V 1p10s L = 22 µH
Frequency = 500 kHz
Figure 12. Boost and LED Efficiency
LM3630A C011_SNVS974.png
VIN = 4.2 V 1p10s L = 22 µH
Frequency = 500 kHz
Figure 14. Boost and LED Efficiency
LM3630A C013_SNVS974.png
VIN = 2.5 V 1p10s L = 10 µH
Frequency = 500 kHz
Figure 16. Boost and LED Efficiency
LM3630A C015_SNVS974.png
VIN = 3.6 V 1p10s L = 10 µH
Frequency = 500 kHz
Figure 18. Boost and LED Efficiency
LM3630A C017_SNVS974.png
VIN = 5.5 V 1p10s L = 10 µH
Frequency = 500 kHz
Figure 20. Boost and LED Efficiency
LM3630A C019_SNVS974.png
VIN = 2.7 V 2p10s L = 10 µH
Frequency = 1 MHz
Figure 22. Boost and LED Efficiency
LM3630A C021_SNVS974.png
VIN = 4.2 V 2p10s L = 10 µH
Frequency = 1 MHz
Figure 24. Boost and LED Efficiency
LM3630A C023_SNVS974.png
VIN = 2.7 V 2p10s L = 10 µH
Frequency = 500 kHz
Figure 26. Boost and LED Efficiency
LM3630A C025_SNVS974.png
VIN = 4.2 V 2p10s L = 10 µH
Frequency = 500 kHz
Figure 28. Boost and LED Efficiency
LM3630A C029_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 30. IIN Across VIN
LM3630A C031_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 32. VOUT Across VIN
LM3630A C033_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 34. PWR_OUT Across VIN
LM3630A C035_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and 2 on DACA
Frequency = 500 kHz 2p6s L = 10 µH
Figure 36. I_INDUCTOR Across VIN
LM3630A C037_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 38. PWR_IN Across VIN
LM3630A C039_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 40. IOUT Across VIN
LM3630A C041_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 10 µH
Figure 42. ILED Across VIN
LM3630A C043_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 44. IIN Across VIN
LM3630A C045_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 46. VOUT Across VIN
LM3630A C047_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 48. PWR_OUT Across VIN
LM3630A C049_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 1 MHz 2p10s L = 10 µH
Figure 50. I_INDUCTOR Across VIN
LM3630A C051_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 52. PWR_IN Across VIN
LM3630A C053_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 54. IOUT Across VIN
LM3630A C055_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p10s
Frequency = 1 MHz LED2 on DACB L = 10 µH
Figure 56. ILED Across VIN
LM3630A C065_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 58. IIN Across VIN
LM3630A C067_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 60. VOUT Across VIN
LM3630A C069_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 62. PWR_IOUT Across VIN
LM3630A C071_SNVS974.png
ILED Full Scale = 28.5 mA LED1 and LED2 on DACA
Frequency = 500 kHz 2p6s L = 22 µH
Figure 64. I_INDUCTOR Across VIN
LM3630A C073_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 66. PWR_IIN Across VIN
LM3630A C075_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 68. IOUT Across VIN
LM3630A C077_SNVS974.png
ILED Full Scale = 28.5 mA LED1 on DACA 2p6s
Frequency = 500 kHz LED2 on DACB L = 22 µH
Figure 70. ILED Across VIN