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TPS4812-Q1

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Automotive 100V low IQ high-side driver with bi-directional current monitoring, I2t, and diagnost

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Data sheet

TPS4812-Q1

ACTIVE
Data sheet Order now

Product details

Operating voltage (max) (V) 100 Operating voltage (min) (V) 3.5 Reverse polarity protection (V) -65 Quiescent current (Iq) (µA) 20 IGate sink (typ) (A) 2 IGate source (typ) (A) 0.5 Current sense accuracy +/-2% at 30-mV VSNS Short-circuit protection response time (µs) 5 Features Automatic load wake-up, Bi-directional, Fault Diagnostics, High-side RSNS, Over Temperature Protection, Overcurrent protection with adjustable delay, Precharge FET driver, Short circuit protection, Undervoltage Lock Out (UVLO), VDS Sensing Operating temperature range (°C) -40 to 125 Rating Automotive
Operating voltage (max) (V) 100 Operating voltage (min) (V) 3.5 Reverse polarity protection (V) -65 Quiescent current (Iq) (µA) 20 IGate sink (typ) (A) 2 IGate source (typ) (A) 0.5 Current sense accuracy +/-2% at 30-mV VSNS Short-circuit protection response time (µs) 5 Features Automatic load wake-up, Bi-directional, Fault Diagnostics, High-side RSNS, Over Temperature Protection, Overcurrent protection with adjustable delay, Precharge FET driver, Short circuit protection, Undervoltage Lock Out (UVLO), VDS Sensing Operating temperature range (°C) -40 to 125 Rating Automotive
VQFN (RGE) 23 16 mm² 4 x 4

  • 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)

  • 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)

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.

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.
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* Data sheet TPS4812-Q1 100V Low IQ Automotive High-Side Switch Controller With Bi-directional IMON, Low Power Mode, Load Wakeup, I2 t, and Diagnostics datasheet PDF | HTML 27 Dec 2024
Certificate TPS4812Q1EVM EU Declaration of Conformity (DoC) 18 Jun 2025
EVM User's guide TPS4812-Q1 Evaluation Module for Smart High-Side Driver PDF | HTML 17 Jun 2025

Design & development

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Evaluation board

TPS1214Q1EVM — TPS1214-Q1 evaluation module

The TPS1214-Q1 evaluation module (EVM) allows reference circuit evaluation of the TPS1214-Q1 smart high-side driver. The EVM allows for full configuration of the high-side driver as well as various parameters such as overcurrent protection, short-circuit protection and configurable I2T control. (...)
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Evaluation board

TPS4812Q1EVM — TPS48120QRGERQ1 evaluation module for smart high-side controller

The TPS4812Q1EVM allows reference circuit evaluation of TI's TPS4812-Q1 smart high-side driver. The TPS4812-Q1 is a 3.5V to 95V smart high-side controller and has two strong 2A gate drivers with separate control inputs allowing multiple configurations including a low power path mode, with auto load (...)

User guide: PDF | HTML
Not available on TI.com
Calculation tool

TPS4812-Q1-CALC — TPS4812-Q1 design calculator

The design calculator allows customer to size the external peripheral components while designing with TPS4812-Q1, TPS1212-Q1, or TPS1214-Q1 controllers.
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Supported products & hardware

Products
High-side switch controllers
TPS4812-Q1 — Automotive 100V low IQ high-side driver with bi-directional current monitoring, I2t, and diagnost TPS1212-Q1 — Automotive 74V low-Iq high-side driver with bidirectional current monitoring, I2t and diagnostics TPS1214-Q1 — Automotive 74V high-side switch controller with low Iq, low power, load wakeup, I2t and diagnostics
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Evaluation board
TPS4812Q1EVM — TPS48120QRGERQ1 evaluation module for smart high-side controller TPS1214Q1EVM — TPS1214-Q1 evaluation module
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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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