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参数资料
| 型号： | DS3881E+T&R/C |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC AUTO CCFL CTRLR 1CH 24-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 100 kHz |
| 电流 - 电源： | 12mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 带卷 (TR) |
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Single-Channel Automotive CCFL Controller
DPWM Soft-Start
At the beginning of each lamp burst, the DS3881 pro-
vides a soft-start that slowly increases the MOSFET
gate-driver duty cycle (see Figure 6). This minimizes
the possibility of audible transformer noise that could
result from current surges in the transformer primary.
The soft-start length is fixed at 16 lamp cycles, but the
soft-start ramp profile is programmable through the
four soft-start profile registers (SSP1/2/3/4) and can
different driver duty cycles to select from to customize
the soft-start ramp (see Tables 4a and 4b). The avail-
able duty cycles range from 0% to 19% in ~3% incre-
ments. In addition, the MOSFET duty cycle from the
last lamp cycle of the previous burst can be used as
part of the soft-start ramp by using the most recent
value duty cycle code. Each programmed MOSFET
gate duty cycle repeats twice to make up the 16 soft-
start lamp cycles.
be adjusted to match the application. There are seven
DPWM SIGNAL
22.5Hz TO 440Hz
LAMP CURRENT
SOFT-START
SOFT-START (EXPANDED)
LAMP CYCLE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GA1/GB1
MOSFET GATE DRIVERS
SOFT-START PROFILE REGISTER
SSP1. 0-3
SSP1. 4-7
SSP2. 0-3
SSP2. 4-7
SSP3. 0-3
SSP3. 4-7
SSP4. 0-3
SSP4. 4-7
PROGRAMMABLE SOFT-START PROFILE WITH INCREASING MOSFET PULSE WIDTHS OVER
A 16 LAMP CYCLE PERIOD RESULTS IN A LINEAR RAMP IN LAMP CURRENT.
LAMP CURRENT
Figure 6. Digital PWM Dimming and Soft-Start
____________________________________________________________________
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3882 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual-Channel Automotive CCFL Controller |
| DS3882_10 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual-Channel Automotive CCFL Controller |
| DS3882E | 制造商:Maxim Integrated Products 功能描述:CAR DUAL CCFL CONTROL TSSOP - 28 - Rail/Tube |
| DS3882E/T&R | 制造商:Maxim Integrated Products 功能描述:CAR DUAL CCFL CTRL TSSOP-28 T&R - Tape and Reel |
| DS3882E+ | 功能描述:IC CCFL CNTRLR DUAL 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
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