TPS92661-Q1 Datasheet, PDF (1/53 Pages) Texas Instruments – High-Brightness LED Matrix Manager for Automotive Headlight Systems

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TPS92661-Q1
SLUSBU2A – SEPTEMBER 2014 – REVISED FEBRUARY 2016
High-Brightness LED Matrix Manager for Automotive Headlight Systems
1 Features
•1 12 Series LED Bypass Switches
• Multi-Drop UART Communication Interface
• Programmable 10-bit PWM Dimming
– Individual Turn-on and Turn-off Times
– Inherent Phase Shift Capability
– Device-to-Device Synchronization
• LED Open/Short Detection and Protection
– Fault Reporting
• AEC-Q100 Grade 1
• Thermally Enhanced Package
– 48-pin, TQFP, Exposed Pad Package
2 Applications
• Automotive headlight systems
• High-Brightness LED Matrix Systems
3 Description
The TPS92661 device is a compact, highly-integrated
solution for shunt FET dimming for large arrays of
high-brightness LEDs in applications such as
automotive headlights.
The TPS92661 device includes a 12-switch series
array for bypassing individual LEDs in the string and
a serial communication interface for control and
management by a master microcontroller.
An on-board charge pump rail that can float up to
67 V above GND provides the LED bypass switch
gate drive.The low on-resistance (R_DS(on)) of the
bypass switch minimizes conduction loss and power
dissipation.
The TPS92661 device contains a multi-drop universal
asynchronous receiver transmitter (UART) for serial
communication. The turn-on and turn-off times are
programmable for each individual LED in the string.
The PWM frequency is adjustable via an internal
register and multiple devices can be synchronized to
the same frequency and phase.
The TPS92661 device features open LED protection
as well as open and short LED fault reporting via the
serial interface.
The TQFP package features a feed-through topology
to enable easy routing of signals on single-layer
metal core LED load boards.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS92661-Q1
PHP (48)
7.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified System Schematic
Driver Module
LED Module
VBAT
Boost
Voltage
Regulator
DC Voltage Rail
Buck Current
Regulator
3.3-V
or
5-V
Auxiliary
Voltage
Regulators
5V
3.3 V
Buck
Supply
and
Return
Cable
TPS92661
LED Matrix
Manager 1
LED12
LED1
CAN
Bus
CAN
Xcvr
µC
Buck Current
Regulator
Rx
Cable
Tx
TPS92661
LED Matrix
Manager n
LED12
LED1
1
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. PRODUCTION DATA.