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Offline Controllers | NCP1239
概览
NCP1239 是一款固定频率电流模式控制器，具有动态自供电功能。此功能可激活内部启动电流源使其在启动期间、瞬变、锁存、待机等期间为控制器供电，大大简化了辅助电源和 Vcc 电容器的设计。 该控制器供电范围高达 35 V，具有带抖动的 65 kHz 或 100 kHz 开关电路，在峰值电流模式控制下运行。当辅助侧功率开始降低时，该控制器将其开关频率自动折回至最低 26 kHz 的水平。当功率进一步下降时，该零部件进入跳过周期，同时对峰值电流进行限制，确保轻型负载条件下的卓越能效。 它具有基于计时器的故障检测可确保过载检测，还具有可调节补偿，有助于保持最大功率，而无论输入电压如何。
应用
- Auxiliary Power
- Industrial Power
终端产品
- AC/DC Power Adapters
- Set-top Box
特性
- Fixed-frequency 65-kHz or 100-kHz current-mode control operation
- Frequency foldback down to 26 kHz and skip mode
- Adjustable Over Power Protection (OPP) circuit
- High-voltage Current Source with Brown-out (BO) detection
- Internal ramp compensation
- Internal fixed 8-ms soft-start
- Frequency jittering in normal and frequency foldback modes
- 64-ms timer-based short-circuit protection with auto-recovery or latched operation
- Pre-short ready
- Latched OVP on Vcc (NCP1239 A & B versions)
- Latched OVP/OTP input for improved robustness
- 35-V Vcc operation
- +500 mA/ -500 mA peak source/sink drive capability
- Internal thermal shutdown
- Extremely low no-load standby power
- Pin-to-pin compatible with the existing NCP1236/1247 series
产品列表
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产品:
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可订购器件:
21
产品
NCP1239AD100R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
100
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239AD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
N
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3398
More Details
NCP1239BD100R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
100
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239BD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239CD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239DD100R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
F
Flyback
Current Mode
100
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239DD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239ED100R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
100
Yes
8
Yes
No
Yes
35
500 / 500
$0.3419
More Details
NCP1239ED65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
No
Yes
35
500 / 500
$0.3419
More Details
NCP1239FD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239GD100R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
100
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239HD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239ID65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
No
Yes
35
500 / 500
$0.3368
More Details
NCP1239JD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3398
More Details
NCP1239KD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3447
More Details
NCP1239LD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3419
More Details
NCP1239MD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
No
Yes
35
500 / 500
$0.3405
More Details
NCP1239ND65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.3398
More Details
NCP1239PD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
No
Yes
35
500 / 500
$0.3425
More Details
NCP1239QD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
No
Yes
35
500 / 500
$0.3419
More Details
NCP1239RD65R2G
Active
Pb
A
H
P
SOIC-7
1
260
REEL
2500
Y
Flyback
Current Mode
65
Yes
8
Yes
Yes
Yes
35
500 / 500
$0.322
More Details
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