TPS4812-Q1数据手册TI中文资料规格书

描述 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.

特性 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)