方案
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Offline Controllers | NCP1253
概览
The NCP1253 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP-6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back it's switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current. To avoid sub harmonic oscillations in CCM operation, adjustable slope compensation is available via the series inclusion of a simple resistor in the current sense signal. Besides the auto-recovery timer-based short-circuit protection, an Over Voltage Protection on the Vcc pin protects the whole circuitry in case of optocoupler destruction or adverse open loop operation.
应用
- Offline Adapters
- AC-DC converters
终端产品
- Set-top Boxes
- Printers
- Notebooks and Netbooks
特性
- Frequency Foldback down to 26 kHz and Skip-Cycle in Light Load
- Internal Ramp Compensation
- Frequency Jittering in Normal and Frequency Foldback modes
- Over Voltage Protection (OVP) monitoring on the Vcc pin
- Timer-based Auto-Recovery or Latched Short-Circuit Protection
产品列表
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产品
NCP1253ASN100T1G
Obsolete
Pb
A
H
P
TSOP-6
1
260
REEL
3000
N
Flyback
Current Mode
100
Yes
8.8
Yes
Yes
Yes
28
300 / 500
Price N/A
More Details
NCP1253ASN65T1G
Obsolete
Pb
A
H
P
TSOP-6
1
260
REEL
3000
N
Flyback
Current Mode
65
Yes
8.8
Yes
Yes
Yes
28
300 / 500
Price N/A
More Details
NCP1253BSN100T1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
Y
Flyback
Current Mode
100
Yes
8.8
Yes
No
Yes
28
300 / 500
$0.2036
More Details
NCP1253BSN65T1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
Y
Flyback
Current Mode
65
Yes
8.8
Yes
No
Yes
28
300 / 500
$0.1768
More Details
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