TPS61194 Datasheet, PDF (1/34 Pages) Texas Instruments – High-Performance 4-Channel LED Driver

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS61194
SNVSAF5A – DECEMBER 2015 – REVISED JANUARY 2016
TPS61194 High-Performance 4-Channel LED Driver
1 Features
•1 Input Voltage Operating Range 4.5 V to 40 V
• Four High-Precision Current Sinks
– Current Matching 1% (Typical)
– Output Current up to 100 mA per Channel
– Outputs can be Combined Externally for
Higher Current per String
• High Dimming Ratio 10 000:1 at 200 Hz
• Integrated DC-DC for LED String Power
– Boost and SEPIC Modes Supported
– Output Voltage up to 45 V
– Switching Frequency 300 kHz to 2.2 MHz
• EMI Minimization
– DC-DC Synchronization Input
– Spread Spectrum Option
• Extensive Fault Detection Features
– Fault Output
– Input Voltage OVP and UVLO
– Open and Shorted LED Fault Detection
– Thermal Shutdown
• Minimum Number of External Components
2 Applications
• Industrial Backlighting Systems in Control Panels
• Test and Measurement Equipment
VIN 4.5...40 V
Simplified Schematic
L1
CIN
D1
VOUT up to 45 V
COUT
SW
R2
R1
BRIGHTNESS
EN
VIN
CLDO
RFSET
LDO
TPS61194
FSET
SYNC
PWM
VDDIO/EN
FAULT
FB
OUT1
OUT2
OUT3
OUT4
ISET
PGND GND PAD
CFB
Up to 100 mA/string
RISET
3 Description
The TPS61194 is a high-efficiency, low-EMI, easy-to-
use LED driver with flexibility to support a wide range
of applications. It has four high-precision current sinks
that can be combined for higher current capability per
string. The device provides high dimming ratio 10
000:1 for up to 200 Hz input PWM frequency.
The TPS61194 has an integrated DC-DC supporting
both boost and SEPIC mode operation. The 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 lowest sufficient level in all conditions. For
EMI control the DC-DC converter supports spread
spectrum for switching frequency and an external
synchronization with dedicated pin.
The TPS61194 has wide input voltage range from
4.5 V to 40 V for robust support of different types of
applications. The TPS61194 integrates extensive
fault detection features.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61194
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
space
space
space
space
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
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.