MP023 – PRIMARY-SIDE CC/CV CONTROLLER

MP023 Rev. 1.1

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7

7/18/2016

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PIN FUNCTIONS

SOIC8-7A

Pin #

Name

Description

1

CS

Current sense. CS connects to the current sense resistor to detect the MOSFET

current for peak current mode control in CV and CC modes. CS can also be used to

select a sampling time by different external resistor configurations. Connect CS to

current sensing resistor directly, if default sampling time is selected.

Please refer to EC table for additional details of sampling time selection.

2

DRV

Driver. DRV drives the external power MOSFET.

3

CP

Output cable compensation. Usually, a 1µF ceramic capacitor can be connected to

CP as a low pass-filter. The compensation voltage can be adjusted by the divided

resistor. CP can also be used to select the secondary duty limitation by different external

resistor configurations. Short CP to GND, if default secondary duty is selected and cable

compensation isn’t required.

Please refer to Table 1 for additional details.

4

VCC

high-voltage current source is turned on to charge VCC. When VCC is charged to a

Connect a 0.1µF ceramic capacitor as close to VCC as possible to decouple the noise

and the bulk capacitor.

5

FB

Feedback. Voltage on FB determines the operation mode (CV or CC mode).

6

GND

Ground.

8

HV

Internal high-voltage current source. HV draws current from the bus to charge up

VCC for start-up.