Datasheet

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FUNCTIONAL BLOCK DIAGRAM
6
DM
5
4 DS
1
5 DS2
16 15 14 13
DM
4
DM
3
DM
2
DM
1
GEAR
CONTROL
&
OPENLAMP
DETECTION
1X, 1.5XCHARGEPUMP
23
VOUT
19202122
C1 -C 2+C2 -C 1 +
24VIN
I
2
C
INTERFACE
ENmain
MainDimming
ENsub
1
ENsub
2
SubDimming
ENaux
AUXDimming
SCLK
SDAT 2
1
6
6
6
18 GND
BIAS, TEST,& MONITORING
ENold
10 GND
9 GND
3 7 17
ENA VIO IS
TPS60251
SLVS767C – APRIL 2007 – REVISED NOVEMBER 2007
TERMINAL FUNCTIONS (continued)
TERMINAL
I/O DESCRIPTION
NAME NO.
C1 – 19 – Connect to the flying capacitor C1
C2+ 20 – Connect to the flying capacitor C2
C2 – 21 – Connect to the flying capacitor C2
C1+ 22 – Connect to the flying capacitor C1
Connect the anodes of the sub, main, and aux display white LEDs to this pin. Bypass VOUT to GND with a
VOUT 23 O
4.7- µ F or greater ceramic capacitor.
Supply voltage input. Connect to a 3-V to 6-V input supply source. Bypass VIN to GND with a 4.7- µ F or
VIN 24 I
greater ceramic capacitor.
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Product Folder Link(s): TPS60251