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参数资料
| 型号： | DS3988T+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/23页 |
| 文件大小： | 0K |
| 描述： | IC CCFL CNTRLR 8CH 48TQFP |
| 标准包装： | 2,000 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 80 kHz |
| 电流 - 电源： | 15mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
8-Channel Cold-Cathode
Fluorescent Lamp Controller
Pin Description
NAME
CH 1
CH 2
PINS BY CHANNEL (n = 1–8)
CH 3 CH 4 CH 5 CH 6
CH 7
CH 8
DESCRIPTION
MOSFET A Gate Drive. Connect directly to logic-
GAn
1
5
9
14
19
25
29
33
level mode n-channel MOSFET. Leave open if
channel is unused.
MOSFET B Gate Drive. Connect directly to logic-
GBn
2
6
10
15
20
26
30
34
level mode n-channel MOSFET. Leave open if
channel is unused.
Lamp Current Monitor Input. Lamp current is
LCMn
3
7
11
16
21
27
31
35
monitored by measuring a 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
OVDn
4
8
12
17
22
28
32
36
monitored through a capacitor-divider placed on
the high-voltage side of the transformer. Leave
open if channel is unused.
NAME
GND
V CC
SDA
SCL
FAULT
LSYNC
LOSC
A0
PSYNC
POSC
BRIGHT
SVM
PIN
13, 18,
24, 45
23, 48
37
38
39
40
41
42
43
44
46
47
DESCRIPTION
Ground Connection
Power-Supply Connection
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 when the
DS3988 is configured as a lamp frequency receiver. If the DS3988 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 DS3988s.
Lamp Oscillator Resistor Adjust. A resistor to ground on this lead sets the frequency of the lamp oscillator.
Address Select Input. Determines the DS3988’s I 2 C slave address.
DPWM Input/Output. This pin is the input for an externally generated DPWM signal when the DS3988 is
configured as a DPWM receiver. If the DS3988 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 DS3988s.
DPWM Oscillator Resistor Adjust. A resistor to ground on this lead sets the frequency of the DPWM oscillator
(dimming clock). This lead can optionally accept a 22.5Hz to 440Hz clock as the source timing for the
internal DPWM signal.
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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3991 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991V | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991VC | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991VR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
| DS3991VRC | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost CCFL Controller |
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