Datasheet DK106 (Dongke Semiconductor) - 5

SHENZHEN DONGKE SEMICONDUCTOR CO., LTD HIGH PERFORMANCE SWITCH MODE POWER CONTROLLER-DK106 9.6 Frequency Jittering Circuit
By sweeping the switching frequency around its nominal value 65KHz, it spreads the energy content on adjacent frequencies rather then keeping it centered in one single ray. This offers the benefit to artificially reduce the measurement noise on a standard EMI/EMC receiver and pass the tests more easily.
9.7 Over Temperature Protection (OTP)
When the controller detects the device temperature exceeds 125℃, OTP is activated. It stops the switching operation immediately and enters into the stop status. The controller will restart to switching operation when the temperature falls to 120℃.
9.8 Over Current Protection (OCP)
Whenever the collector current (Ip) abnormally exceeds the maximum current limit of 400mA, the controller would stop operation and enters into stop status.
9.9 Abnormal Voltage Protection
Whenever the power voltage (Vcc) abnormally exceeds 6V and drops under 4V, the controller would stop operation and enters into stop status.
9.10 Over Collector Voltage Protection
Whenever the voltage of the collector pin exceeds the limit, the controller will decrease the power output to make sure the collector pin coming back to normal. It could reduce the stress of the power transistor and the protect power transistor from avalanche damage. Address: Building 18, Hejing industrial zone, Heping village, Fuyong, Baoan Area, Shenzhen, China. Tel: 86-20-38488121 Email: amy_hsf@yahoo.cn Website: www.yxpower.com