TYPICAL APPLICATIONS
INTRODUCTION
VIN
10uH
60 V, 1A
LED
LEG 1
LED
LEG 2
LED
LEG 3
LED
LEG 4
LED
LEG 5
LED
LEG 6
10uf
25V
2 .2uF
2.2 uF
100 pF
100pF
100 pF
0. 1uf
VIN
VD C1
1
20
4
3
24
SWA
SWB
VOU T
100 pF
100 pF
2.2nF
10 V
VD C2
2. 2uF
10 V
23
2
5
PGN D
PGN D
M Ω
680K O
100p F
22
OVP
167K Ω
10k Ω
kO
7nF
3.3K Ω
COM P
56pF
17
MC34845A
7
8
9
10
CH1
CH2
CH3
CH4
Cont rol
Un it
EN
PWM
WAKE
6
16
18
15
13
EP
21
11
12
14
CH5
CH6
F AIL
Caps should be located
7.65k Ω
0.1 %
GND
GND
as close as possible to the
MC34845 Device
Figure 11. Typical Application Circuit for Single Wire Control, f S = 1.2 MHz
(V IN = 9.0V, I LED = 20 mA/channel, 10 LEDs/channel, OVP = 35V, V PWM = 3.3V)
VIN
33uH
80V, 1A
LED
LEG 1
LED
LEG 2
LED
LEG 3
LED
LEG 4
LED
LEG 5
LED
LEG 6
2uF
2uF 2uF
2uF
10uf
25V
100 pF
100pF
100pF
0. 1uf
VI N
VDC1
1
20
4
3
24
S WA
S WB
V OUT
100 pF
100pF
2. 2uF
10V
VDC2
2.2uF
10V
23
2
5
P GND
P GND
680k Ω
100 pF
22
OVP
114k Ω
56nF
2k Ω
COMP
220pF
MC34845 B/D
7
8
9
10
CH1
CH2
CH3
CH4
765k Ω Ω
10k Ω
Cont rol
Unit
7.65k
0. 1%
EN
PWM
WAKE
6
16
18
15
13
GND
EP
21
GND
11
12
14
CH5
CH6
FAIL
Caps should be located
as close as possible to the
MC34845 Device
Figure 12. Typical Application Circuit for Single Wire Control, f S = 300 kHz
(V IN = 8.0V, I LED = 20 mA/channel, 14 LEDs/channel, OVP = 49V, V PWM = 3.3V)
34845
Analog Integrated Circuit Device Data
Freescale Semiconductor
17
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相关代理商/技术参数
MC34845BEP 功能描述:USB 接口集成电路 6-Ch LED Backlt Driver RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20
MC34845BEPR2 功能描述:USB 接口集成电路 6-Ch LED Backlt Driver RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20
MC34845CEP 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MC34845CEPR2 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MC34845DEP 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MC34845DEPR2 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MC34845EP 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MC34845EPR2 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N