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TPS92602-Q1 Datasheet(PDF) 10 Page - Texas Instruments

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Part # TPS92602-Q1
Description  TPS9260x-Q1 Single- and Dual-Channel Automotive Headlight LED Driver
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS92602-Q1 Datasheet(HTML) 10 Page - Texas Instruments

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ROVFB_B
+
±
+
±
+
±
+
±
+
±
+
ROVFB_A
RSNS
RLED_SNS
ROSC
RZ
CZ
CP
C
CVCC
+
V(BAT)
PWMIN
ICTRL
COMP
RT
DIAG
TPS9260x-Q1
VDD
VCC
VIN
UVLO
LDO
Int. FET
Voltage
Monitor
TJ
Shutdown
Shutdown
Logic
VCC
CLRZ
CLRZ
QZ
D
CLK
Slope
Compensation
Over-
current
Detect
100 mV
2.2 V
0.75 V
Soft-
start
MP
D
L
LED
OVFB
ISNS
GDRV
PWMO
VOUT
ISN
ISP
GND
PGND
Osc
or
PLL
Q
&
LDO
Int. FET
1
TPS92601-Q1, TPS92602-Q1, TPS92601A-Q1, TPS92602A-Q1
SLUSBP5D – MARCH 2014 – REVISED JANUARY 2015
www.ti.com
8 Detailed Description
8.1 Overview
The TPS92602-Q1 device is a dual-channel LED driver. The base of each independent driver is a peak-current-
mode boost controller. The two boost controllers operate 180° out-of-phase in order to reduce ripple currents and
radiation.
Each controller is independently configurable to regulate the output current (the typical case for driving LEDs) or
to regulate the output voltage. Depending on the chosen configuration for each channel, one loop is active while
the other loop only acts in case of a failure condition. In a constant-current application, the inactive voltage loop
sets the maximum output-voltage limit (and hence becomes active in case of output overvoltage due to an open
LED). In constant-voltage applications, the inactive current loop sets the maximum output current limit (and
hence becomes active in case of output overcurrent because of an LED short to ground).
The TPS92601-Q1 device is a single-channel version of the TPS92602-Q1 device. Both devices have the same
functions.
8.2 Functional Block Diagram
Figure 9. Block Diagram, TPS9260x-Q1 in Boost-To-Battery Configuration
10
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Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: TPS92601-Q1 TPS92602-Q1 TPS92601A-Q1 TPS92602A-Q1


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