参数资料
| 型号： | ISL6307AIRZ |
| 厂商： | Intersil |
| 文件页数： | 23/33页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 48-QFN |
| 标准包装： | 43 |
| PWM 型： | 电压模式 |
| 输出数： | 6 |
| 频率 - 最大： | 275kHz |
| 占空比： | 66.7% |
| 电源电压： | 4.75 V ~ 5.25 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 包装： | 管件 |
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ISL6307A
In normal operation, DRVEN remains low until ISL6307A
begins soft-start ramp and then is pulled high (Figure 14).
When an overcurrent event occurs, DRVEN is pulled low
0A
OUTPUT CURRENT, 50A/DIV
instantly, less than 20ns, to disable the driver so that both
upper and lower FETs turn off (Figure 15). During an
overvoltage condition, DRVEN remains high to allow the
drivers to turn on the lower FETs to discharge the energy
stored in the output inductor. Once the output voltage is
reduced to 0.4V, DRVEN is pulled low, as shown in
Figure 16.
OUTPUT VOLTAGE,
500mV/DIV
DRVEN, 5V/DIV
0V
2ms/DIV
0V
FIGURE 13. OVERCURRENT BEHAVIOR IN HICCUP MODE.
F SW = 500kHz
At the beginning of overcurrent shutdown, the controller
places all PWM signals in a high-impedance state within
20ns, commanding the Intersil MOSFET driver ICs to turn off
both upper and lower MOSFETs. The system remains in this
state for a period of 4096 switching cycles. If the controller is
still enabled at the end of this waiting period, it will attempt a
0A
OUTPUT CURRENT, 50A/DIV
OUTPUT VOLTAGE,
500mV/DIV
soft-start. If the fault remains, the trip-retry cycles will
continue indefinitely (as shown in Figure 13) until either the
0V
2ms/DIV
controller is disabled or the fault is cleared. Note, the energy
delivered during trip-retry cycling is much less than during
FIGURE 15. DRVEN DURING OVERCURRENT OPERATION
full-load operation. There is no thermal hazards during this
kind of operation.
DRVEN, 5V/DIV
DRVEN, 5V/DIV
VOUT, 1V/DIV
OUTPUT VOLTAGE,
500mV/DIV
EN, 5V/DIV
2ms/DIV
500μs/DIV
FIGURE 16. DRVEN DURING OVERVOLTAGE OPERATION
FIGURE 14. DRVEN WAVEFORM AT STARTUP
There’s no need to use DRVEN when ISL6307A is used with
Driver Enable Output
The ISL6307A has a driver enable output pin, DRVEN.
DRVEN is designed for applications where ISL6307A need
to work with drivers that can not recognize three-state PWM
input.
23
Intersil’s 12V drivers, such as ISL6612 and ISL6614. For
drivers such as ISL6609 and ISL6605, DRVEN output of
ISL6307A can be connected to the EN pin of the driver.
FN9236.0
February 6, 2006
相关PDF资料 |
PDF描述 |
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| ISL6307BIRZ | IC REG CTRLR BUCK PWM VM 48-QFN |
| ISL6307IRZ | IC REG CTRLR BUCK PWM VM 48-QFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6307AIRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6307BCRZ | 功能描述:软开关 PWM 控制器 W/ANNEAL 6-PHS VR11 CNTRLR COM RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6307BCRZ-T | 功能描述:软开关 PWM 控制器 W/ANNEAL 6-PHS VR11 CNTRLR COM TAPE AND RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6307BIRZ | 功能描述:软开关 PWM 控制器 W/ANNEAL 6-PHS VR11 CNTRLR INDUSTRIAL RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6307BIRZ-T | 功能描述:软开关 PWM 控制器 W/ANNEAL 6-PHS VR11 CNTRLR INDUSTRIAL RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
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