TPS4812-Q1中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

1 Features

? AEC-Q100 automotive qualified for grade 1

temperature

? 3.5V to 95V input range (100V absolute maximum)

? Reverse input and output protection down to –65V

? Integrated 12V charge pump

? Low IQ = 20μA in low power mode (LPM = Low)

? Low 1μA shutdown current (EN/UVLO = Low)

? Dual gate drive: GATE: 0.5A src/2A sink G: 100μA

src/0.39A sink

? Accurate I2t overcurrent protection (IOC) with

adjustable circuit breaker timer (I2t)

? Accurate and fast (5μs) short-circuit protection

? Fast transition (5μs) from low power mode

to active mode using adjustable load wakeup

threshold or LPM trigger with WAKE indication

? Accurate analog bi-directional current monitor

output (IMON, I_DIR): ±2% at 30mV VSNS

? NTC based overtemperature sensing (TMP) and

monitoring output (ITMPO)

? Fault indication (FLT) during short circuit fault, I2t,

charge pump UVLO, overtemperature

? TPS48120-Q1 (I2t enabled), TPS48121-Q1 (I2t

disabled)

? Accurate (±2%) and adjustable undervoltage

lockout (UVLO)

2 Applications

? Power distribution box

? Body control module

? DC/DC converter

? Battery management system

3 Description

TPS4812-Q1 is a family of low IQ smart high

side drivers with protection and diagnostics. With

wide operating voltage range of 3.5V to 95V, 100V

absmax the device is suitable for 12V, 24V and 48V

automotive system designs.

It has two integrated gate drives with 0.5A source and

2A sink (GATE) and 100μA source and 0.39A sink

(G). With LPM Low, the low power path is kept ON

and the main FETs are turned OFF with IQ of 20μA

(typ). Auto Load wakeup threshold adjusted using

RBYPASS resistor placed across DRN and CS2–. IQ

reduces to 1μA (typ) with EN/UVLO low.

The device has accurate bi-directional current sensing

(±2%) output (IMON, I_DIR) with adjustable I2t based

overcurrent and short circuit protection using an

external RSNS resistor and FLT indication. Auto-retry

and latch-off fault behavior can be configured. The

device also has NTC based temperature sensing

(TMP) and monitoring output (ITMPO) output for

overtemperature detection of external FETs.

The TPS4812-Q1 is available in 23-pin VQFN

package.