HI-SINCERITY

MICROELECTRONICS CORP.

Spec. No. : IC200918

Issued Date : 2009.09.14

Revised Date : 2009.10.29

Page No. : 8/9

H211

HSMC Product Specification

The safety value of Rc=1kΩ.

D1 is the reverse protection diode. As if the red and black wires reversely are connected with the power source,

the current will flow through the ground via IC and coils L1 and L2 to power supply. Under such kind of

circumstance, the IC and coils are easy to be burned out. Therefore, D1, the reverse protection diode, is

necessary for the design. However, D1 will also cause an extra voltage drop on the supply voltage.

C1 is a capacitor to reduce the ripple noise caused during the transient of the output stages. The volume of the ripple

noise depends on the coil impedance and characteristics.

Fig.18 H211 Typical Application Circuit