LM3492HCMH datasheet(7/29 Pages) TI1

7 / 29 page

LM3492HC-Q1, LM3492HC

www.ti.com

SNVS797B – MARCH 2012 – REVISED OCTOBER 2015

Electrical Characteristics (continued)

over operating free-air temperature range, VIN = 12 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

COMM PIN

COMM goes LOW during VIOUT

VIOUT-OV

IOUT pin overvoltage threshold

5.6

6.7

7.8

rising, other VIOUT = 1.2 V

VCOMM-LOW

COMM pin at LOW

5 mA into COMM

0.7

ILEAK-FAULT

COMM pin open leakage

VCOMM = 5 V

µA

THERMAL PROTECTION

TOTM

Overtemperature indication

TJ rising

135

°C

Over-temperature indication

TOTM-HYS

TJ falling

°C

hysteresis

TSD

Thermal shutdown temperature

TJ rising

165

°C

Thermal shutdown temperature

TSD-HYS

TJ falling

°C

hysteresis

7.6 Typical Characteristics

Unless otherwise specified the following conditions apply: TJ = 25°C, VIN = 12 V with configuration in typical application circuit

for ILED = 250 mA shown in this data sheet.

Figure 1. Quiescent Current vs Input Voltage

Figure 2. VCC Voltage vs VCC Ouput Current

Figure 3. VCC Voltage vs Input Voltage

Figure 4. Switching Frequency vs Input Voltage

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