TPS92601-Q1_16 Datasheet, PDF (1/47 Pages) Texas Instruments – Single- and Dual-Channel Automotive Headlight LED Driver

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TPS92601-Q1, TPS92602-Q1, TPS92601A-Q1, TPS92602A-Q1
SLUSBP5D – MARCH 2014 – REVISED JANUARY 2015
TPS9260x-Q1 Single- and Dual-Channel Automotive Headlight LED Driver
1 Features
•1 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
2 Applications
• Automotive Headlight LED Driver
• High-Brightness LED Applications
3 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.
Device Information(1)
PART NUMBER
SENSE-VOLTAGE
RANGE
CHANNELS
TPS92601-Q1
15 mV–150 mV
1
TPS92601A-Q1(2) 30 mV–300 mV
1
TPS92602-Q1
15 mV–150 mV
2
TPS92602A-Q1(2) 30 mV–300 mV
2
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) Device is available as a preview only.
4 Typical Schematic
VBAT
Part of
RT TPS92602-Q1
VBAT
DIAG1
COMP1
GDRV1
ISNS1
CHANNEL
1
ICTRL1
PWIN1
ISP1
ISN1
VOUT1
PWMO1
OVFB1
PGND1
VCC
Part of
TPS92602-Q1
1
DIAG2
COMP2
GDRV2
ISNS2
CHANNEL
2
ICTRL2
PWIN2
ISP2
ISN2
VOUT2
PWMO2
OVFB2
PGND2
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.