Datasheet

LM3463
SNVS807A –MAY 2012–REVISED MAY 2013 www.ti.com
PIN DESCRIPTIONS (continued)
Pin Name Description Application information
Operation mode selection input pin. Bias this pin externally to set the
LM3463 in different operation mode.
Direct PWM mode: V
MODE
= GND
18 MODE Mode select input pin
Serial interface mode: V
MODE
= No Connection
DC interface mode: V
MODE
= VCC
Output terminal of the internal voltage regulator. This pin should be
19 VCC Internal regulator output
bypassed to GND through a 1uf ceramic capacitor.
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.
20 VLedFB Rail voltage detection input pin
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
21 OutP DHC output Driver output voltage feedback node of the primary power supply through a
resistor and a diode to realize rail voltage adjustment.
22 NC No connection
Supply voltage input pin. This pin should be bypassed to GND using a 1uF
23 VIN System supply
ceramic capacitor.
24 NC No connection
Connect to the junction of the drain terminal of the external MOSFET and
Channel 5 drain voltage feedback
25 DR5 the cathode of the LED string. This pin is connected to the internal
input to facilitate DHC
comparator to facilitate DHC.
26 NC No connection
Connect to the junction of the drain terminal of the external MOSFET and
Channel 4 drain voltage feedback
27 DR4 the cathode of the LED string. This pin is connected to the internal
input to facilitate DHC
comparator to facilitate DHC.
28 NC No connection
Connect to the junction of the drain terminal of the external MOSFET and
Channel 3 drain voltage feedback
29 DR3 the cathode of the LED string. This pin is connected to the internal
input to facilitate DHC
comparator to facilitate DHC.
30 NC No connection
Connect to the junction of the drain terminal of the external MOSFET and
Channel 2 drain voltage feedback
31 DR2 the cathode of the LED string. This pin is connected to the internal
input to facilitate DHC
comparator to facilitate DHC.
32 NC No connection
Connect to the junction of the drain terminal of the external MOSFET and
Channel 1 drain voltage feedback
33 DR1 the cathode of the LED string. This pin is connected to the internal
input to facilitate DHC
comparator to facilitate DHC.
34 NC No connection
Connect to the junction of the drain terminal of the external MOSFET and
Channel 0 drain voltage feedback
35 DR0 the cathode of the LED string. Voltage on this pin is being fed to the
input to facilitate DHC
internal comparator to facilitate DHC.
36 NC No connection
Channel 5 LED driver sense input Connect to the junction of the source terminal of the external MOSFET
37 SE5
pin and the sense resistor to facilitate current regulation for channel 5.
38 GD5 channel 5 gate drive output pin Gate driver output. Connect to the gate terminal of the external MOSFET.
Channel 4 LED driver sense input Connect to the junction of the source terminal of the external MOSFET
39 SE4
pin and the sense resistor to facilitate current regulation for channel 4.
40 GD4 channel 4 gate drive output pin Gate driver output. Connect to the gate terminal of the external MOSFET.
Channel 3 LED driver sense input Connect to the junction of the source terminal of the external MOSFET
41 SE3
pin and the sense resistor to facilitate current regulation for channel 3.
42 GD3 channel 3 gate drive output pin Gate driver output. Connect to the gate terminal of the external MOSFET.
Channel 2 LED driver sense input Connect to the junction of the source terminal of the external MOSFET
43 SE2
pin and the sense resistor to facilitate current regulation for channel 2.
44 GD2 channel 2 gate drive output pin Gate driver output. Connect to the gate terminal of the external MOSFET.
Channel 1 LED driver sense input Connect to the junction of the source terminal of the external MOSFET
45 SE1
pin and the sense resistor to facilitate current regulation for channel 1.
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