参数资料
| 型号： | NCP1396BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 21/25页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR ISO PWM VM 16-SOIC |
| 产品变化通告： | Package Pin Removal 11/Feb/2008 |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 575kHz |
| 占空比： | 52% |
| 电源电压： | 10.5 V ~ 20 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 ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽）15 引线 |
| 包装： | 标准包装 |
| 其它名称： | NCP1396BDR2GOSDKR |
NCP1396A, NCP1396B
On Figure 46, Q1 is blocked and does not bother the BO
measurement as long as the NTC and the optocoupler are
not activated. As soon as the secondary optocoupler senses
an OVP condition, or the NTC reacts to a high ambient
temperature, Q1 base is brought to ground and the BO pin
goes up, permanently latching off the controller.
Protection Circuitry
This resonant controller differs from competitors thanks
to its protection features. The device can react to various
inputs like:
- Fast events input: like an over-- current condition, a
need to shut down (sleep mode) or a way to force a
controlled burst mode (skip cycle at low output
power): as soon as the input level exceeds 1 V typical,
Vdd
Itimer
pulses are immediately stopped. When the input is
released, the controller performs a clean startup
sequence including a soft-- start period.
- Slow events input: this input serves as a delayed
shutdown, where an event like a transient overload
does not immediately stopped pulses but start a timer.
If the event duration lasts longer than what the timer
imposes, then all pulses are disabled. The voltage on
the timer capacitor (pin 3) starts to decrease until it
reaches 1 V. The decrease rate is actually depending
on the resistor the user will put in parallel with the
capacitor, giving another flexibility during design.
Figure 47 depicts the architecture of the fault circuitry.
Ctimer
Ctimer
UVLO
Reset
+
1 = fault
0 = ok
ON/OFF +
-
Rtimer
Slow Fault
Average
Input
Current
To Primary
Current Sensing
+ -
Vref Fault
+
Circuitry
VtimerON
VtimerOFF
1 = ok
0 = fault
-
V CC
+
Vref Fault
+
FB
FB
1 = ok
0 = fault
Reset
DRIVING
LOGIC
SS
Fast Fault
Skip
A
B
A
B
Figure 47. This circuit combines a slow and fast input for improved protection features
Slow Input
On this circuit, the slow input goes to a comparator.
When this input exceeds 1 V typical, the current source
Itimer turns on, charging the external capacitor Ctimer. If
the fault duration is long enough, when Ctimer voltage
http://onsemi.com
21
相关PDF资料 |
PDF描述 |
|---|---|
| NCP1397ADR2G | IC REG CTRLR ISO PWM 16-SOIC |
| NCP1417DMR2 | IC REG BST SYNC ADJ 0.2A 8MICRO |
| NCP1421DMR2 | IC REG BST SYNC ADJ 0.6A 8MICRO |
| NCP1450ASN50T1G | IC REG CTRLR BST PWM VM 5TSOP |
| NCP1521BMUTBG | IC REG BUCK SYNC ADJ 0.6A 6UDFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1396BPG | 功能描述:电压模式 PWM 控制器 RESONANT MODE CNTRLR W/ H/L SIDES DRIVERS 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 |
| NCP1396D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller featuring High--Voltage Drivers |
| NCP1397A | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
| NCP1397ADR2G | 功能描述:电流型 PWM 控制器 NCP1397A RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1397B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
发布紧急采购，3分钟左右您将得到回复。