zds1009 Zetex Semiconductors plc., zds1009 Datasheet

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zds1009

Manufacturer Part Number
zds1009
Description
Zds1009 - Current Mirror
Manufacturer
Zetex Semiconductors plc.
Datasheet

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Part Number:
ZDS1009
Manufacturer:
ZETEX
Quantity:
20 000
SM-8 COMPLEMENTARY CURRENT MIRROR
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
a p p lic ations base i nc l udi ng bat t er y ch a rg e
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.
FEATURES
SCHEMATIC DIAGRAM
CONNECTION DIAGRAM
ISSUE 2 - JANUARY 2000
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
V
sense
sensitivity = 100mV/A
1
For balance R3=R4
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.
R1=R3=R4=100
V
sense
R2=100m
TYPICAL APPLICATION CIRCUIT
IR
2
R
eg
R
4
1
(8 LEAD SOT223)
SM-8
ZDS1009

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zds1009 Summary of contents

Page 1

... SM-8 COMPLEMENTARY CURRENT MIRROR 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 lic ations base udi ng bat management, DC motor control and over current monitoring functions ...

Page 2

... ZDS1009 ABSOLUTE MAXIMUM RATINGS. PARAMETER Maximum Operating Voltage Maximum Voltage (E1-E2,E3-E4) Peak Pulse Current Continuous Current (E1-E4,E2-E3) Total Power Dissipation at T amb Operating and Storage Temperature Range * The power which can be dissipated assuming the device is mounted in a typical manner on a PCB with copper equal to 2 inches square ...

Page 3

... Phase Change v Frequency Response Figure 2 Output Zero-Offset Voltage Test Circuit 3 ZDS1009 +25°C Vcc= 100 100m 1 Vin - Input Voltage ( 10k 100 Vin = 1V Vcc = 5V VAC = 0. 25°C 10k ...

Page 4

... ZDS1009 NPN 1.4 +25°C Iout = 0.95Iin 1.2 1.0 0.8 0.6 0.4 100µA 1mA 10mA I - Input Current (A) in Input/Cutoff Voltage v I NPN 1.6 1.4 1.2 1.0 0.8 0.6 Vcutoff 0.4 Vin 0.2 0 -55 -35 - Temperature (°C) Input/Output Voltage v Temperature NPN 1.05 +25°C 1.04 1.03 1.02 1.01 1.00 0.99 0.98 100µA 0.97 0.96 0. (V) - Collector-Emitter Voltage (V) ce Current Transfer v Vce TYPICAL CHARACTERISTICS 1.4 +25°C Iout = 0 ...

Page 5

... These are supported by 3510 Metroplaza, Tower 2 agents and distributors in Hing Fong Road, major countries world-wide Kwai Fong, Hong Kong © Zetex plc 2000 Telephone:(852) 26100 611 Fax: (852) 24250 494 Internet : http://www.zetex.com 5 ZDS1009 Inches Max Min Typ Max 1 0.067 0.1 ...

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