参数资料
型号: LTC3205EUF
厂商: Linear Technology
文件页数: 6/16页
文件大小: 0K
描述: IC LED DRVR WT/RGB BCKLGT 24-QFN
标准包装: 91
拓扑: PWM,降压(降压),升压(升压),切换式电容器(充电泵)
输出数: 9
内部驱动器:
类型 - 主要: 背光
类型 - 次要: RGB,白色 LED
频率: 600kHz ~ 1.1MHz
电源电压: 2.8 V ~ 4.5 V
安装类型: 表面贴装
封装/外壳: 24-WFQFN 裸露焊盘
供应商设备封装: 24-QFN 裸露焊盘(4x4)
包装: 管件
工作温度: -40°C ~ 85°C
LTC3205
PI FU CTIO S
V IN (Pin 16): Supply Voltage for the Charge Pump. The V IN
pin should be connected directly to the battery and by-
passed with a 1 μ F X5R or X7R ceramic capacitor.
SGND (Pin 17): Ground for the Control Logic. This pin
should be connected directly to a low impedance ground
plane.
RED, GREEN, BLUE (Pins 18, 19, 20): Current Source
Outputs for the RGB Illuminator LEDs. The currents for
the RGB LEDs are controlled by the resistor on the I RGB
pin. The RGB LEDs can independently be set to any duty
cycle from 0/15 through 15/15 under software control
giving a total of 16 shades per LED and a total of 4096
BLOCK DIAGRA
colors for the illuminator. See Tables 1 and 3. The RGB
LEDs are modulated at 1/240 the speed of the charge
pump oscillator.
SUB1, SUB2 (Pins 22, 21): Current Source Outputs for
the Sub Display White LEDs. The current for the sub
display is controlled by the resistor on the I MS pin. The
LEDs on the sub display can be set to 100%, 50%, 25% or
0% of full scale under software control. See Tables 1
and 2.
PGND (Pin 25, Exposed Pad): Power Ground for the
Charge Pump. The exposed pad should be connected
directly to a low impedance ground plane.
800kHz
OSCILLATOR
C1 +
5
C1 –
4
C2 +
6
C2 –
3
25 PGND
15 CPO
V IN 16
1:1 AND 2:3 CHARGE PUMP
+
ENABLECP
+
2 MAIN1
I MS 14
1 MAIN2
24 MAIN3
23 MAIN4
+
I RGB 13
2
2
22 SUB1
21 SUB2
SGND 17
18 RED
DV CC 12
CONTROL
19 GREEN
STEPUP 11
LOGIC
PWM
20 BLUE
ENRGB 10
2
2
4
4
4
LD 9
D IN 7
SCLK 8
COMMAND LATCH
16
SHIFT REGISTER
3205 BD
3205f
6
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LTC3205EUFPBF 制造商:Linear Technology 功能描述:Multidisplay LED Controller,LTC3205
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