TPS61194-Q1_16 Datasheet, PDF (1/10 Pages) Texas Instruments – TPS61194-Q1 Low-EMI Automotive LED Driver With Four 100-mA Channels

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TPS61194-Q1
SNVSAN1 – AUGUST 2016
TPS61194-Q1 Low-EMI Automotive LED Driver With Four 100-mA Channels
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
Range
• Input Voltage Operating Range 4.5 V to 40 V
• Four High-Precision Current Sinks
– Current Matching 1% (Typical)
– LED String Current up to 100 mA per Channel
– Outputs can be Combined Externally for
Higher Current per String
• High Dimming Ratio of 10 000:1 at 100 Hz
• Integrated Boost/SEPIC Converter for LED String
Power
– Output Voltage up to 45 V
– Switching Frequency 300 kHz to 2.2 MHz
– Switching Synchronization Input
– Spread Spectrum for Lower EMI
• Extensive Fault Detection Features
– Fault Output
– Input Voltage OVP and UVLO
– Open and Shorted LED Fault Detection
– Thermal Shutdown
• Minimum Number of External Components
VIN 4.5...40 V
Simplified Schematic
L1
D1
VOUT up to 45 V
C_IN
C_OUT
R2
R1
SW
FB
VIN
BRIGHTNESS
EN
CLDO
RFSET
LDO
TPS61194-Q1 OUT1
OUT2
FSET
OUT3
SYNC
OUT4
PWM
VDDIO/EN
FAULT
ISET
PGND GND PAD
C_FB
Up to 100 mA/string
RISET
Copyright © 2016, Texas Instruments Incorporated
1
2 Applications
• Backlight for:
– Automotive Infotainment
– Automotive Instrument Clusters
– Smart Mirrors
– Heads-Up Displays (HUD)
– Central Information Displays (CID)
– Audio-Video Navigation (AVN)
3 Description
The TPS61194-Q1 is an automotive high-efficiency,
low-EMI, easy-to-use LED driver with integrated DC-
DC converter. The DC-DC converter supports both
boost and SEPIC mode operation. The device has
four high-precision current sinks that can be
combined for higher current capability.
The DC-DC converter has adaptive output voltage
control based on the LED current sink headroom
voltages. This feature minimizes the power
consumption by adjusting the voltage to the lowest
sufficient level in all conditions. For EMI reduction
DC-DC supports spread spectrum for switching
frequency and an external synchronization with
dedicated pin. A wide-range adjustable frequency
allows the TPS61194-Q1 to avoid disturbance for AM
radio band.
The input voltage range for the TPS61194-Q1 is from
4.5 V to 40 V to support automotive stop/start and
load dump condition. The TPS61194-Q1 integrates
extensive fault detection features.
To request a full data sheet or other design
resources: request TPS61194-Q1.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61194-Q1
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
100
95
90
85
80
75
70
65
0
System Efficiency
VIN=5V
VIN=8V
VIN=12V
VIN=16V
20
40
60
80
100
Brightness (%)
C012
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.