SLVSIQ0 May   2025 LP8865C-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4  Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Adaptive Off-Time Current Mode Control
      2. 7.3.2 Setting LED Current
      3. 7.3.3 Internal Soft Start
      4. 7.3.4 Dimming Mode
        1. 7.3.4.1 PWM dimming
        2. 7.3.4.2 Analog dimming
      5. 7.3.5 Fault Protection
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 LP8865CUQDGNRQ1 12V Input, 1A Output, 8-piece WLED Driver With Analog Dimming
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Inductor Selection
          2. 8.2.1.2.2 Input Capacitor Selection
          3. 8.2.1.2.3 Output Capacitor Selection
          4. 8.2.1.2.4 Sense Resistor Selection
          5. 8.2.1.2.5 Other External Components Selection
      2. 8.2.2 LP8865CYQDGNRQ1 24V Input, 0.5A Output, 4-piece WLED Driver With PWM Dimming
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Inductor Selection
          2. 8.2.2.2.2 Input Capacitor Selection
          3. 8.2.2.2.3 Output Capacitor Selection
          4. 8.2.2.2.4 Sense Resistor Selection
          5. 8.2.2.2.5 Other External Components Selection
      3. 8.2.3 LP8865CWQDGNRQ1 24V Input, 2A Output, 4-piece WLED Driver With Analog Dimming
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
          1. 8.2.3.2.1 Inductor Selection
          2. 8.2.3.2.2 Input Capacitor Selection
          3. 8.2.3.2.3 Output Capacitor Selection
          4. 8.2.3.2.4 Sense Resistor Selection
          5. 8.2.3.2.5 Other External Components Selection
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5 Pin Configuration and Functions

LP8865C-Q1 8-Pin Buck HVSSOPTop ViewFigure 5-1 8-Pin Buck HVSSOPTop View
Table 5-1 Pin Functions
PINTYPE(1)DESCRIPTION
No.NAME
1GNDGGround pin.
2VINPInput power pin.
3DIMI

PWM dimming pin for X/Y/Z. Input PWM signal for PWM dimming. Analog dimming pin for U/V/W. Input analog signal for analog dimming.

4VCCPInternal LDO output pin. Connect with a 16V, 1μF capacitor to GND.
5COMPI/OError-amilifier output. Connect capacitors to GND. Different capacitor values determine different softstart times and bandwidths.
6CSPILED current sense positive pin.
7CSNILED current sense negative pin.
8SWPSwitching node pin. Internally connected to the low-side MOSFET. Connect with the power inductor and the schottky diode.
PadThermal PadNC No connection.
  1. I = Input, O = Output, P = Supply, G = Ground
LP8865C-Q1 8-Pin Boost/Buck-Boost HVSSOPTop ViewFigure 5-2 8-Pin Boost/Buck-Boost HVSSOPTop View
Table 5-2 Pin Functions for boost/buck-boost topology
PINTYPE(1)DESCRIPTION
VSON PackageNAME
1 GND G Ground pin.
2 VIN P Input power pin.
3 DIM I

PWM dimming pin for X/Y/Z. Input PWM signal for PWM dimming. Analog dimming pin for U/V/W. Input analog signal for analog dimming.
4 VCC P Internal LDO output pin. Connect with a 16V, 1μF capacitor to GND.
5 COMP I/O Error-amilifier output. Connect capacitors to GND. Different capacitor values determine different softstart times and bandwidths.
6 CSN I LED current sense negative pin.
7 CSP I LED current sense positive pin.
8 SW P Switching node pin. Internally connected to the low-side MOSFET. Connect with the power inductor and the schottky diode.
Pad Thermal Pad NC No connection.
(1) I = Input, O = Output, P = Supply, G = Ground