- 您现在的位置：买卖IC网 > PDF目录15205 > NCP1562BDBR2G (ON Semiconductor)IC REG CTRLR PWM VM 16-TSSOP PDF资料下载
参数资料
| 型号： | NCP1562BDBR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM VM 16-TSSOP |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 占空比： | 85% |
| 电源电压： | 23.2 V ~ 100 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCP1562BDBR2GOSCT |
NCP1562A, NCP1562B
Cycle Skip
(V EA is not controlling the duty cycle)
Traditionally, a voltage on the CS higher than V ILIM has
been used to trigger a cycle skip fault. Unfortunately, the
V EA
V SS
FF Ramp
fast response time of modern controllers makes it hard to
reach a voltage on the CS pin higher than V ILIM .
Instead of using a higher voltage threshold to detect a
cycle skip fault, the NCP1562 uses a timer. It monitors the
current limit comparator and if a continuous
cycle-- by-- cycle current limit condition exists the converter
is disabled. The time to disable the converter and the time
the converter is disabled are programmed by the capacitor
on the CSKIP pin, C CSKIP .
The cycle skip detection circuit charges C CSKIP with a
continuous 100 m A current once cycle-- by-- cycle current
limit fault is detected. If the current limit fault persists,
Figure 36. Soft--Stop Behavior After Soft--Start
is Complete and V EA is Open.
If the voltage on the V AUX pin reaches V AUX(off2) , C SS is
immediately discharged and the outputs are disabled. V SS
should not be pulled up or down externally.
CURRENT LIMIT
The NCP1562 has two overcurrent modes,
cycle-- by-- cycle and cycle skip, providing the best
protection during momentary and continuous overcurrent
conditions.
Cycle--by--Cycle
In cycle-- by-- cycle, the conduction period ends once the
voltage on the CS pin reaches the current limit voltage
threshold (V ILIM ). The NCP1562A has a V ILIM of 0.2 V
and the NCP1562B has a V ILIM of 0.5 V.
C CSKIP continues to charge until reaching the cycle skip
upper threshold (V CSKIP(peak) ) of 3.0 V. Once reached, the
converter enters the soft–stop mode and C CSKIP is
discharged with a constant 10 m A current. A new soft-- start
sequence commences once C CSKIP reaches the lower cycle
skip threshold (V CSKIP(valley) ) of 0.5 V. If the overcurrent
condition is still present, the capacitor starts charging on
the next current limit event. Otherwise, C CSKIP is
discharged down to 0 V.
The cycle skip capacitor provides a means of
remembering previous overcurrent conditions. If a
continuous overcurrent condition is removed before
reaching V CSKIP(peak) , C CSKIP starts a controlled
discharge. If the continuous overcurrent fault is once again
detected before C CSKIP is completely discharged, C CSKIP
charges from its existing voltage level, taking less time to
reach V CSKIP(peak) . Figure 37 shows operating waveforms
during a continuous overcurrent condition. For optimal
operation, the cycle skip discharge time should be longer
than the soft-- stop period.
V ILIM
CS
V CSKIP(peak)
V CSKIP
V CSKIP(valley)
V SS
Figure 37. Cycle Skip Waveforms
http://onsemi.com
16
相关PDF资料 |
PDF描述 |
|---|---|
| VI-J54-EY-F1 | CONVERTER MOD DC/DC 48V 50W |
| VE-B4N-EV-F2 | CONVERTER MOD DC/DC 18.5V 150W |
| VI-B7Z-EY-F4 | CONVERTER MOD DC/DC 2V 20W |
| GEC60DRTN-S93 | CONN EDGECARD 120PS DIP .100 SLD |
| VI-B7Z-EY-F3 | CONVERTER MOD DC/DC 2V 20W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1562BDR2G | 功能描述:电压模式 PWM 控制器 HI PERF RESET PWM CONTLR RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| NCP1571D | 功能描述:DC/DC 开关控制器 Low Voltage RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP1571DG | 功能描述:DC/DC 开关控制器 Low Voltage Synchronous Buck RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP1571DR2 | 功能描述:DC/DC 开关控制器 Low Voltage RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP1571DR2G | 功能描述:DC/DC 开关控制器 Low Voltage Synchronous Buck RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
发布紧急采购，3分钟左右您将得到回复。