Datasheet

FUNCTIONAL BLOCK DIAGRAM
5
DM5
6
DS1
7 DS2
11 10 9 8
DM 4 DM 3 DM 2 DM 1
GEAR
CONTROL
&
OPENLAMP
DETECTION
1X, 1.5XCHARGEPUMP
1
VOUT
13141516
C
1
-
C
2
+
C
2
-
C
1
+
2
VIN
I2C
INTERFACE
ENmain
MainDimming
ENsub 1
ENsub 2
SubDimming
ENaux
AUXDimming
SCLK
SDAT 4
3
6
6
6
12 GND
BIAS, TEST,& MONITORING
ENold
TYPICAL CHARACTERISTICS
TABLE OF GRAPHS
TPS60250
TPS60252
www.ti.com ............................................................................................................................................................ SLVS769C – APRIL 2007 – REVISED APRIL 2008
DESCRIPTION REF
Efficiency vs Input Voltage, 4 Main LED - 15 mA, 25 mA Figure 3
Efficiency
Efficiency vs Input Voltage, 2 Sub LED with Light Load Condition, × 1 Mode Operation Figure 4
Switch Resistance vs Free-Air Temperature, × 1 Mode, I
LED
= 230 mA Figure 5
Switch Resistance vs Free-Air Temperature, × 1 Mode, I
LED
= 100 mA Figure 6
Output Impedance of × 1
and × 1.5 Mode
Switch Resistance vs Free-Air Temperature, × 1.5 Mode Charge Pump Open-Loop , I
LED
= 230 mA Figure 7
Switch Resistance vs Free-Air Temperature, × 1.5 Mode Charge Pump Open-Loop, I
LED
= 100 mA Figure 8
Shutdown Current Shutdown Current vs Input Voltage Figure 9
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