Texas Instruments TPS92601A-Q1

Description

The TPS9260x-Q1 family of devices is a single-channel and dual-channel high-side-current LED driver. With full protection and diagnostics, this family of devices is dedicated for and ideally suited to automotive front lighting. The base of each independent driver is a peak-current-mode boost controller. Each controller has two independent feedback loops, a current-feedback loop with a high-side current-sensing shunt and a voltage-feedback loop with an external resistor-divider network. The controller delivers a constant output voltage or a constant output current. The connected load determines whether the device regulates a constant output current (if the circuit reaches the current set-point earlier than voltage set-point) or a constant output voltage (if the circuit reaches the voltage set-point is reached first, for example, in an open-load condition).

Each controller supports all typical topologies such as boost, boost-to-battery, SEPIC, or flyback.

Uses of the high-side PMOS FET driver are for PWM dimming of the LED string and for cutoff in case of an external short circuit to GND to protect the circuit.

Features

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
• Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature
• Device HBM ESD Classification Level 2
• Device CDM ESD Classification Level C4B
• Input Voltage: 4 V–40 V (45 V Abs. Max.)
• Output Voltage: 4 V–75 V (80 V Abs. Max.)
• Fixed-Frequency Current-Mode Controller With Integrated Slope Compensation
• Two Regulation Loops, Constant-Current Output and Constant-
• Voltage Output of Each Channel
• High-Side Current Sense:
• 150-mV or 300-mV Sense Voltage (EEPROM Option)
• ±6-mV Offset (Achieving Approx. 4% or 2% LED Current Accuracy)
• Output Voltage Sense, Internal Voltage Reference: 2.2 V ±5%
• Integrated Low-Side NMOS-FET Driver: Peak Gate-Drive Current Typ. 0.7 A
• Frequency Synchronization
• Both PWM Dimming and Analog Dimming
• Diagnostic:
• High-Side Current (LED Current) Available as Analog Output
• Open-LED and Short-to-GND Detection
• Shorted Output Protection
• Internal Under- and Overvoltage Lockout

Typical applications

• High-Brightness LED Applications
• Automotive Headlight LED Driver

More information

• Datasheet
• IC product information