SNVS416C November 2005 – February 2016 LM27951
PRODUCTION DATA.
MIN | MAX | UNIT | ||
---|---|---|---|---|
VIN | –0.3 | 6 | V | |
EN, PWM | –0.3 | VIN + 0.3(3) | V | |
Continuous power dissipation | Internally limited | |||
Junction temperature, TJ-MAX-ABS | 150 | °C | ||
Lead temperature (Soldering, 5 sec.) | 260 | °C | ||
Storage temperature, Tstg | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
Inpu voltage, VIN | 2.8 | 5.5 | V | ||
LED voltage | 2.5 | 3.9 | V | ||
Junction temperature, TJ | –40 | 115 | °C | ||
Ambient temperature, TA | –40 | 85 | °C |
THERMAL METRIC(1) | LM27951 | UNIT | |
---|---|---|---|
NHK (WSON) | |||
14 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 42.5 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 33.3 | °C/W |
RθJB | Junction-to-board thermal resistance | 14.1 | °C/W |
ψJT | Junction-to-top characterization parameter | 0.5 | °C/W |
ψJB | Junction-to-board characterization parameter | 14.1 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | 6.1 | °C/W |
PARAMETER | TEST CONDITIONS | MIN |
TYP | MAX |
UNIT | |
---|---|---|---|---|---|---|
IDX | LED current regulation | 3 V ≤ VIN ≤ 5.5 V RSET = 12.5 kΩ IVOUT = 0 mA |
18.4 (−8%) |
20 | 21.6 (8%) |
mA |
3 V ≤ VIN ≤ 5.5 V RSET = 8.32 kΩ IVOUT = 0 mA |
30 | |||||
3 V ≤ VIN ≤ 5.5 V RSET = 24.9 kΩ IVOUT = 0 mA |
10 | |||||
ID-MATCH | LED current matching(3) | RSET = 8.32 kΩ | 0.2 | 1.5% | ||
IQ | Quiescent supply current | D(1-4) = OPEN RSET = OPEN |
1.5 | 1.9 | mA | |
ISD | Shutdown supply current | 3 V ≤ VIN ≤ 5.5 V V(EN) = 0 V |
0.1 | 1 | µA | |
VSET | ISET pin voltage | 3 V ≤ VIN ≤ 5.5 V | 1.25 | V | ||
IDX / ISET | Output current to current set ratio | 200 | ||||
VHR | Current source voltage headroom requirement(4) | IDX = 95% IDX (nominal) RSET = 8.32 kΩ (IDX nominal = 30 mA) |
360 | mV | ||
IDX = 95% IDX (nom.) RSET = 12.5 kΩ (IDX nom. = 20 mA) |
240 | |||||
fSW | Switching frequency | 525 (–30%) |
750 | 975 (30%) |
kHz | |
VIH | Logic input high | Input pins: EN, PWM 3 V ≤ VIN ≤ 5.5 V |
1 | VIN | V | |
VIL | Logic input low | Input pins: EN, PWM 3 V ≤ VIN ≤ 5.5 V |
0 | 0.4 | ||
IIH | Logic input high current | Input pin: PWM V(PWM) = 1.8 V |
10 | nA | ||
Input pin: EN V(EN) = 1.8 V(5) |
12 | µA | ||||
IIL | Logic input low current | Input pins: EN, PWM V(EN, PWM) = 0 V |
10 | nA | ||
ROUT | Charge pump output resistance (6) | 3.3 | Ω | |||
VGDX | 1× to 3/2× gain transition voltage threshold on VDX | (VOUT − VDX) Falling | 500 | mV | ||
tON | Start-up time | IDX = 90% steady state | 330 | µs |
VIN = 3.6V | Time scale: 400 ns/Div | Load = 15 mA/LED, 4 LEDs |
CH1 (TOP): VIN; Scale: 20mV/Div, AC Coupled | ||
CH2 (BOTTOM): VOUT; Scale: 20mV/Div, AC Coupled |
VIN = 3.6 V | Time scale: 100 µs/Div | Load = 20mA/LED, 4 LEDs |
CH1 (TOP): VEN; Scale: 1 V/Div | ||
CH2 (BOTTOM): VOUT; Scale: 1 V/Div |