DESCRIPTION

The ZDS1009 current mirror has been developed specifically for high side, current sense plus level translation applications and as such will find a broad applications base including battery charge management, DC motor control and over current monitoring functions. It is of particular interest for current sense applications for feedback purposes in fast battery chargers for Li-Ion cell based systems.

The device functions by sensing the voltage developed across an external (user defined) high side current sense resistor, and by an arrangement of current mirrors refer this sensed voltage, with or without multiplication, to a low side referenced signal. This signal can then be used, for example, to close the control loop to a controller IC, for a DC-DC converter providing charge to a battery.

FEATURES

• Excellent Temperature Tracking Characteristics

• Compact Cost Effective Solution

• Simplifies Circuit Implementation

• Broad application base from

Single Cell Li-ion High Side Current sense chargers to

Multi-cell Lead-Acid systems

• Only 4 Connections required