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LM3463SQX 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
描述:
动态余量控制与热控制接口和单个通道调光控制 Dynamic Headroom Controller with Thermal Control Interface and Individual Channel Dimming Control
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3P4P5Hot
典型应用电路图在P2P31
原理图在P13P14
封装尺寸在P35P36P37
封装信息在P35P36P37
技术参数、封装参数在P1P6
应用领域在P1P40
电气规格在P6P7P8P9P10P11P12
导航目录
LM3463SQX数据手册
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LM3463
SNVS807 –MAY 2012
www.ti.com
Pin Descriptions (continued)
Pin Name Description Application information
The function of this pin differs depending on the selected operation mode
Multi-function input pin.
that sets by the MODE pin.
Direct PWM mode: apply bi-level PWM signal (TTL logic high and low) to
Channel 2/3 PWM dimming control this pin to enable/disable ch2 and ch3. Apply a logic high to this pin to
enable both channel 2 and 3.
8 DIM23
In serial interface mode, this pin is configured as the serial clock signal
Serial clock input
input.
In DC interface mode, the voltage on this pin is converted into PWM
DC voltage dimming control
dimming duty for channel 2 and 3.
The function of this pin differs depending on the selected operation mode
Multi-function input pin.
that sets by the MODE pin.
Direct PWM mode: apply bi-level PWM signal to this pin to enable/disable
Channel 4 dimming control
channel 4. Apply logic high to this pin to enable channel 4.
In serial interface mode, this pin is configured as load pulse input, pulling
9 DIM4
this pin low will latch the shifted-in data into internal register of the
Load data control pin LM3463. This pin is pulled low if the requested load operation is not
completed. User should check the status of this pin before writing data into
the LM3463 through this pin.
In DC interface mode, the voltage on this pin is converted into PWM
DC voltage dimming control
dimming duty for channel 4.
The function of this pin differs depending on the selected operation mode
Multi-function input pin.
that sets by the MODE pin.
Direct PWM mode: Apply a bi-level PWM signal (TTL logic high and low)
Channel 5 dimming control to this pin to enable/disable channel 5. Apply a logic high to this pin to
10 DIM5
enable channel 5.
Serial operation mode This pin should connect to GND when serial operation mode is selected.
In DC interface mode, the voltage on this pin is converted into PWM
DC voltage dimming control
dimming duty for channel 5.
Serial control signal output pin for cascade operation. This signal
Serial data output for cascade
synchronizes with the rising edge of the CLKOUT signal and carries
operation
information to the slave devices to turn on LEDs.
11 SYNC
Sync. pulse input in direct PWM This is a synchronization signal input pin for the slave device to perform
mode LED pretest upon system startup.
Dimming clock output for cascade Dimming clock output for cascade operation. The frequency at this pin
12 CLKOUT operation / Sync pulse output for equal to 1/2 of the internal clock or externally applied clock frequency.
Direct PWM mode
Connect a resistor from this pin to GND to set the additional bias current
13 ISR Start up current control pin
to the C
DHC
upon system startup.
The voltage on this pin defines the threshold of the drain voltage of the
external MOSFETs (V
DRn
) to begin output current reduction.
As the V
DRn
exceeds V
DRVLIM
, the LED driving current reduces according
14 DRVLIM MOSFET power limit setting input
to the increasing of V
DRn
at certain fixed rate. This function prevents the
MOSFET from over-heating. The maximum power dissipation is limited to
V
DRVLIM
* I
LED
(per ch.).
Dynamic headroom control time Connect a capacitor (C
DHC
) from this pin to ground to program the DHC
15 CDHC
constant capacitor loop response.
Connect a capacitor, C
FLT
from this pin to ground to program the fault de-
16 FCAP Fault de-bounce capacitor
bounce time.
17 GND System ground This pin should connect to the system ground
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.
4 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated
Product Folder Links: LM3463
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