TPS92830-Q1 Datasheet, PDF (1/7 Pages) Texas Instruments – 3-Channel High-Current Linear LED Controller

TPS92830-Q1
SLIS184 – AUGUST 2017
TPS92830-Q1 3-Channel High-Current Linear LED Controller
1 Features
•1 AEC-Q100 Qualified
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C4B
• Wide Voltage Input Range From 4.5 V to 40 V
• 3-Channel High-Side Current Driving and Sensing
– Channel-Independent Current Setting
– Channel-Independent PWM Inputs
– PWM Dimming via Both PWM Inputs and
Power Supply
– Optimized Slew Rate for EMC
• High-Precision LED Driving
– Precision Current Regulation With External
NMOS FET (3% Tolerance)
– 20:1 Analog Dimming Profile With Off-Board
Bin Resistor Support
– Precision PWM Generator With Full Duty-
Cycle Mask (2% Tolerance)
– Open-Drain PWM Output for Synchronization
• Protection and Diagnostics
– Adjustable Output Current Derating for
External MOSFET Thermal Protection
– Diagnostics for LED-String Open Circuit or
Short Circuit With Auto Recovery
– Diagnostic-Enable With Adjustable Threshold
for Low-Voltage Operation
– Fault Bus up to 15 Devices, Configurable As
Either One-Fails–All-Fail or Only-Failed-
Channel-Off
– Low Quiescent Current in Fault Mode (<2 mA
per Device)
• Operating Junction Temperature Range: –40°C to
150°C
• TSSOP 28 Package (PW)
2 Applications
• Rear Light – Tail and Stop Light, Rear Turn
Indicator, Fog Light, Reverse Light
• Front Light – Position Light, Daytime Running
Light, Front Turn Indicator, Low Beam
3 Description
With the trend of better lighting homogeneity, high-
current LEDs are often used in automotive front and
rear lamps with lighting diffusers and light-guides.
Meanwhile, in order to meet strict EMC and reliability
requirements, linear LED drivers are popular in
automotive applications. However, it is a challenge to
deliver high current for linear LED drivers with
integrated power transistors.
The TPS92830-Q1 device is an advanced
automotive-grade high-side constant-current linear
LED controller for delivering high current using
external N-channel MOSFETs. The device has a full
set of features for automotive applications and is
compatible with a wide selection of N-channel
MOSFETs.
Each channel of the TPS92830-Q1 device sets the
channel current independently by the sense-resistor
value. An internal precision constant-current
regulation loop senses the channel current by the
voltage across the sense resistor and controls the
gate voltage of the N-channel MOSFET accordingly.
The device also integrates a two-stage charge pump
for low-dropout operation. The charge-pump voltage
is high enough to support a wide selection of N-
channel iMOSFETs. iPWM idimming iallows imultiple
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS92830-Q1
TSSOP (28)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Battery
Full Duty Cycle
Simplified Schematic
TPS92830-Q1
CP1P
ISP
CP1N
GND
CP2N
ISN1
G1
SENSE1
CP2P
CPOUT
ISN2
IN
G2
DIAGEN
SENSE2
DERATE
ISN3
G3
SENSE3
PWM1
PWMOUT
PWM2
FAULT
PWM3
PWMCHG
FD
IREF
ICTRL
FAULT Bus
Copyright © 2017, Texas Instruments Incorporated
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. ADVANCE INFORMATION for pre-production products; subject to
change without notice.