TPS92510 Datasheet, PDF (6/25 Pages) Texas Instruments – 1.5-A Constant-Current Buck Converter for High-Brightness LEDs with Integrated LED Thermal Foldback

TPS92510
SLUSAE4A – JANUARY 2012 – REVISED JUNE 2012
FUNCTIONAL BLOCK DIAGRAM
www.ti.com
2.9 µA
0.9 µA
Thermal
Shutdown
VIN
UVLO
EN 3
+
1.25 V
Enable
Comparator
Shutdown Logic
COMP 8
VSENSE 7
200 mV
Error Amplifier
+
PDIM ₄
1.35 V
1 µA
PDIM
+ ^Comparator
TSENSE 6
100 µA
Temperature
+ Comparator
COMP S/H
S
+
EA
Clamp
Slope
Compensation
BOOT
UVLO
R
R
Logic
and
R
Q
PWM
Latch
R
S
Oscillator
with PLL
2V
5.9 kHz
0V
5
RT/CLK
BOOT
Charge
2 VIN
1 BOOT
Current
Sense
10 PH
PowerPAD
9 GND
TPS92510
UDG-11043
6
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