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Datasheet

Datasheet

BM2P074KF-G

TSZ02201-0F1F0A200270-1-2

14.Mar.2017.Rev.002

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TSZ22111・15・001

(2 ) Start sequences

(Soft start operation, light load operation, and auto recovery operation during overload protection)

Start sequences are shown in Figure 7. See the sections below for detailed descriptions.

Switching

Figure 7. Start sequences Timing Chart

A: Input voltage VH is applied

B: This IC starts operating VCC pin voltage rises when VCC > V

protection functions are judged as normal. Between the secondary output voltage become constant level, because the

VCC pin consumption current causes the VCC value to drop. VCC recharge function start if VCC voltage < V

CHG2

（

10V

typ）

C: With the soft start function, overcurrent limit value is restricted to prevent any excessive rise in voltage or current.

D: When the switching operation starts, VOUT rises. The output voltage become to stable state, also VCC voltage become

to stable state through auxiliary winding. Please set to achieve at the rated voltage within the T

from VCC voltage > V

down. During burst operation, it becomes low-power consumption mode.

F: When the FB Voltage＞V

G: When FB pin voltage keeps V

triggered and switching stops 64ms later. If the FB pin voltage becomes FB<V

reset.

H: If the VCC voltage drops to VCC < V

I:

The IC’s circuit current is reduced and the VCC pin value rises. (Same as B)