LM3463_12 Datasheet, PDF (5/40 Pages) Texas Instruments – LM3463 Dynamic Headroom Controller with Thermal Control Interface and Individual Channel Dimming Control

LM3463
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Pin
Name
20
VLedFB
21
OutP
22
NC
23
VIN
24
NC
25
DR5
26
NC
27
DR4
28
NC
29
DR3
30
NC
31
DR2
32
NC
33
DR1
34
NC
35
DR0
36
NC
37
SE5
38
GD5
39
SE4
40
GD4
41
SE3
42
GD3
43
SE2
44
GD2
45
SE1
46
GD1
47
SE0
48
GD0
EP
SNVS807 – MAY 2012
Pin Descriptions (continued)
Description
Rail voltage detection input pin
DHC output Driver
System supply
Channel 5 drain voltage feedback
input to facilitate DHC
Channel 4 drain voltage feedback
input to facilitate DHC
Channel 3 drain voltage feedback
input to facilitate DHC
Channel 2 drain voltage feedback
input to facilitate DHC
Channel 1 drain voltage feedback
input to facilitate DHC
Channel 0 drain voltage feedback
input to facilitate DHC
Channel 5 LED driver sense input
pin
channel 5 gate drive output pin
Channel 4 LED driver sense input
pin
channel 4 gate drive output pin
Channel 3 LED driver sense input
pin
channel 3 gate drive output pin
Channel 2 LED driver sense input
pin
channel 2 gate drive output pin
Channel 1 LED driver sense input
pin
channel 1 gate drive output pin
Channel 0 LED driver sense input
pin
channel 0 gate drive output pin
Thermal Pad
Application information
This pin detects the output voltage of the primary power supply (V_RAIL).
LEDs will be turned on when the voltage at this pin reaches 2.5V.
Connect this pin to VCC to set a device as a slave.
This pin is an open drain output (current sink) which should connect to the
output voltage feedback node of the primary power supply through a
resistor and a diode to realize rail voltage adjustment.
No connection
Supply voltage input pin. This pin should be bypassed to GND using a 1uF
ceramic capacitor.
No connection
Connect to the junction of the drain terminal of the external MOSFET and
the cathode of the LED string. This pin is connected to the internal
comparator to facilitate DHC.
No connection
Connect to the junction of the drain terminal of the external MOSFET and
the cathode of the LED string. This pin is connected to the internal
comparator to facilitate DHC.
No connection
Connect to the junction of the drain terminal of the external MOSFET and
the cathode of the LED string. This pin is connected to the internal
comparator to facilitate DHC.
No connection
Connect to the junction of the drain terminal of the external MOSFET and
the cathode of the LED string. This pin is connected to the internal
comparator to facilitate DHC.
No connection
Connect to the junction of the drain terminal of the external MOSFET and
the cathode of the LED string. This pin is connected to the internal
comparator to facilitate DHC.
No connection
Connect to the junction of the drain terminal of the external MOSFET and
the cathode of the LED string. Voltage on this pin is being fed to the
internal comparator to facilitate DHC.
No connection
Connect to the junction of the source terminal of the external MOSFET
and the sense resistor to facilitate current regulation for channel 5.
Gate driver output. Connect to the gate terminal of the external MOSFET.
Connect to the junction of the source terminal of the external MOSFET
and the sense resistor to facilitate current regulation for channel 4.
Gate driver output. Connect to the gate terminal of the external MOSFET.
Connect to the junction of the source terminal of the external MOSFET
and the sense resistor to facilitate current regulation for channel 3.
Gate driver output. Connect to the gate terminal of the external MOSFET.
Connect to the junction of the source terminal of the external MOSFET
and the sense resistor to facilitate current regulation for channel 2.
Gate driver output. Connect to the gate terminal of the external MOSFET.
Connect to the junction of the source terminal of the external MOSFET
and the sense resistor to facilitate current regulation for channel 1.
Gate driver output. Connect to the gate terminal of the external MOSFET.
Connect to the junction of the source terminal of the external MOSFET
and the sense resistor to facilitate current regulation for channel 0.
Gate driver output. Connect to the gate terminal of the external MOSFET.
Connect to the GND pin. The EP has no internal connection to ground and
must connect to the GND pin externally. Place 9 vias from EP to copper
ground plane.
Copyright © 2012, Texas Instruments Incorporated
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