S1009 Ver la hoja de datos (PDF) - Diodes Incorporated.

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S1009

SM-8 COMPLEMENTARY CURRENT MIRROR

Diodes Incorporated. 

SM-8 COMPLEMENTARY CURRENT MIRROR

ZDS1009

DESCRIPTION

The ZDS1009 current mirror has been developed The device functions by sensing the voltage developed

specifically for high side, current sense plus level across an external (user defined) high side current

translation applications and as such will find a broad sense resistor, and by an arrangement of current

applications base including battery charge mirrors refer this sensed voltage, with or without

management, DC motor control and over current multiplication, to a low side referenced signal. This

monitoring functions. It is of particular interest for signal can then be used, for example, to close the

current sense applications for feedback purposes in fast control loop to a controller IC, for a DC-DC converter

battery chargers for Li-Ion cell based systems.

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

SM-8

(8 LEAD SOT223)

SCHEMATIC DIAGRAM

TYPICAL APPLICATION CIRCUIT

R

V=

sense

IR 4

2R

1

For balance R3=R4

eg

R2=100mΩ

R1=R3=R4=100Ω

Vsense sensitivity = 100mV/A

CONNECTION DIAGRAM

ISSUE 2 - JANUARY 2000

1

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