参数资料
| 型号： | DS3984T+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC CCFL CNTRLR 4CH 32-TQFP |
| 标准包装： | 1 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 80 kHz |
| 电流 - 电源： | 12mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（7x7） |
| 包装： | 托盘 |
4-Channel Cold-Cathode
Fluorescent Lamp Controller
Pin Description
NAME
PINS BY CHANNEL (n = 1–4) [TQFP/SO]
CH 1 CH 2 CH 3 CH 4
DESCRIPTION
GAn
GBn
5/7
6/8
10/11
11/12
17/17
18/18
21/21
22/22
MOSFET A Gate Drive. Connect directly to logic-level mode
n-channel MOSFET. Leave open if channel is unused.
MOSFET B Gate Drive. Connect directly to logic-level mode
n-channel MOSFET. Leave open if channel is unused.
Lamp Current Monitor Input. Lamp current is monitored by measuring a
LCMn
7/9
12/13
19/19
23/23
voltage across a resistor placed in series with the low-voltage side of the
lamp. Leave open if channel is unused.
Overvoltage Detection. Lamp voltage is monitored through a capacitor-
OVDn
8/10
13/14
20/20
24/24
divider placed on the high-voltage side of the transformer. Leave open if
channel is unused.
NAME
GND
V CC
BRIGHT
SVM
SDA
SCL
FAULT
TQFP
1, 9,
14, 16
2, 15
3
4
25
26
27
PIN
SO
15
16
5
6
25
26
27
DESCRIPTION
Ground Connection
Power-Supply Connection
Analog Brightness Control Input. Used to control DPWM dimming. Ground when using a PWM
signal at PSYNC to control brightness.
Supply Voltage Monitor Input. Used to monitor the inverter voltage for undervoltage conditions.
Serial Data Input/Output. I 2 C bidirectional data pin, which requires a pullup resistor to realize high
logic levels.
Serial Clock Input. I 2 C clock input.
Fault Output. Active-low, open-drain, requires external pullup resistor to realize high logic levels.
Lamp Frequency Input/Output. This pin is the input for an externally sourced lamp frequency
LSYNC
28
28
when the DS3984 is configured as a lamp frequency receiver. If the DS3984 is configured as a
lamp frequency source (i.e., the lamp frequency is generated internally), the frequency is output
on this pin for use by other lamp frequency receiver DS3984s.
LOSC
A0
29
30
1
2
Lamp Oscillator Resistor Adjust. A resistor to ground on this lead sets the frequency of the lamp.
Address Select Input. Determines the DS3984’s I 2 C slave address.
DPWM Input/Output. This pin is the input for an externally generated DPWM signal when the
PSYNC
31
3
DS3984 is configured as a DPWM receiver. If the DS3984 is configured as a DPWM source (i.e.,
the DPWM signal is generated internally), the DPWM signal is output on this pin for use by other
DPWM receiver DS3984s.
DPWM Oscillator Resistor Adjust. A resistor to ground on this lead sets the frequency of the
POSC
32
4
DPWM oscillator (dimming clock). This lead can optionally accept a 22.5Hz to 440Hz clock as the
source timing for the internal DPWM signal.
_____________________________________________________________________
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3984T+ | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| DS3984Z | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4-Channel Cold-Cathode Fluorescent Lamp Controller |
| DS3984Z+ | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4-Channel Cold-Cathode Fluorescent Lamp Controller |
| DS3988 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Channel Cold-Cathode Fluorescent Lamp Controller |
| DS3988T | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
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