NCP1219 查看數據表（PDF） - ON Semiconductor

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NCP1219

PWM Controller with Adjustable Skip Level and External Latch Input

ON Semiconductor 

NCP1219

However, if the fault lasts for more than 118 ms, then the

driver turns off and the device enters the VCC double hiccup

mode described earlier.

4.8 V

V FB

FB

VFB

3

+

VSS −

Soft−start

1 V max

118 ms

delay

Fault

disable Drv

The NCP1219 also has an internal temperature shutdown

circuit. If the junction temperature of the controller reaches

155°C (typical), the driver turns off and the controller

enters double hiccup mode.

Latched and Auto−Retry Options

The NCP1219A offers a latched fault circuitry. An

overload fault condition detected by the controller results

in a latch−off shutdown, requiring the controller to be reset

by cycling VCC (removing the ac line input). NCP1219B

provides an auto−retry circuit. All fault conditions except

the external latch fault result in the controller entering

double hiccup mode, attempting to restart the controller

every other VCC cycle, as mentioned earlier.

Figure 42. Block Diagram of Timer−Based Fault

Detection

Table 5. ORDERING INFORMATION

Device

Overcurrent

Frequency

Package

Shipping†

NCP1219AD65R2G

Latch

65 kHz

SOIC−7 (Pb−Free)

2500 / Tape & Reel

NCP1219BD65R2G

Auto−Recovery

65 kHz

SOIC−7 (Pb−Free)

2500 / Tape & Reel

NCP1219AD100R2G

Latch

100 kHz

SOIC−7 (Pb−Free)

2500 / Tape & Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

http://onsemi.com

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