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ZDS1009
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 li c ati ons bas e i nc l udi ng ba t t e ry 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. 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
*
SM-8 (8 LEAD SOT223)
SCHEMATIC DIAGRAM
TYPICAL APPLICATION CIRCUIT
R
Vsense = IR2
4
R1
For balance R3=R4 eg R2=100m R1=R3=R4=100 Vsense sensitivity = 100mV/A
CONNECTION DIAGRAM
ISSUE 2 - JANUARY 2000 1
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 = 25C* Operating and Storage Temperature Range SYMBOL V y1-x1 V E-E' IM IC P tot T j :T stg VALUE 120 10 4 1 2 -55 to +150 UNIT V V A A W C
* 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.
ELECTRICAL CHARACTERISTICS (at Tamb=25C)
Parameter Breakdown Voltage Breakdown Voltage Breakdown Voltage Breakdown Voltage Breakdown Voltage Breakdown Voltage Breakdown Voltage Leakage Leakage Leakage Leakage Leakage Leakage Leakage Input Voltage Input Voltage Input Voltage Input Voltage Transfer Characteristic Transfer Characteristic Output Zero-Offset Voltage Symbol BV Y1-X1 BV X1-E1 BV Y1-E3 BV E1-Y1 BV E2-Y1 BV E3-X1 BV E4-X1 I Y1 I X1 I Y1 I E1 I E2 I E3 I E4 V Y1-E2 V Y1-E3 V X1-E1 V X1-E4 V OUT V OUT V OFFSET -1.45 1.45 -1.45 1.45 0.99 1 4 Min 120 -30 30 -12 -6 12 6 50 -10 10 -100 -100 100 100 -1.65 1.75 -1.75 1.65 1.01 Max Unit V V V V V V V nA A A nA nA nA nA V V V V V mV mV Conditions I Y1 =100A I X1 =-10mA I Y1 =10mA I E1 =-100A I E2 =-100A I E3 =100A I E4 =100uA V Y1-X1 =100V V X1-E1 =-30V, V y1 =V E1 V Y1-E3 =30V,V X1 =V E3 V E1-Y1 =-8V V E2-Y1 =-4V V E3-X1 =8V V E4-X1 =4V I Y1 =-1A I Y1 =1A,V X1 =V Y1 I X1 =-1A,V X1 =V Y1 I X1 =1A See Fig 1.V CC =5V R1=R3=R4=100, V IN =1V See Fig 1.V CC =5V R1=R3=R4=100, V IN =5mV See Fig 2.V CC =5V,R 2 <1 R1=R3=R4=100
ISSUE 2 - JANUARY 2000 2
ZDS1009
TYPICAL CHARACTERISTICS
1.20 1.15
+25C
1.3
Vin = 0.1V
+25C
Vcc=5V
1.2
Voltage Transfer
1.10
Voltage Transfer
1.1 1.0 0.9 0.8 0.7 10m
R = 10 R = 100 R=1k
1.05 1.00
R = 10 R = 100 R=1k
0.95 0 5 10 15 20 25 30 35
100m
1
10
Vcc - Supply Voltage(V)
Vin - Input Voltage (V)
Voltage Transfer v Supply Voltage
Voltage Transfer v Input Voltage
1.00 0.90
Phase Change (Degrees)
180 200 220
R = 10k
Voltage Transfer
R = 10k
0.80 0.70
R = 1k R = 100
240 260 280 300 320 340
R = 1k R = 100
Vin = 1V Vcc = 5V VAC = 0.1V
Vin = 1V Vcc = 5V
0.60 0.50 100
T = 25C
VAC = 0.1V
1k
10k
100k
1M
360 1k
T = 25C
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
Voltage Transfer v Frequency Response
Phase Change v Frequency Response
TEST CIRCUITS
Figure 1 Transfer Characteristic Test Circuit ISSUE 2 - JANUARY 2000 3
Figure 2 Output Zero-Offset Voltage Test Circuit
ZDS1009
TYPICAL CHARACTERISTICS
NPN
1.4 1.2
+25C Iout = 0.95Iin
1.4
PNP
+25C Iout = 0.95Iin
1.2
Voltage - (V)
Voltage - (V)
1.0 0.8
Vin Vcutoff
1.0
0.8
Vin Vcutoff
0.6
0.6
0.4 100A
1mA
10mA
100mA
1A
0.4 100
1m
10m
100mA
1A
Iin - Input Current (A)
Iin - Input Current (A)
Input/Cutoff Voltage v Iin
NPN
1.6 1.4 1.2
Iin = 1mA Iout = 0.95mA
Input/Cutoff Voltage v Iin
PNP
Iin = 1mA Iout = 0.95mA
1.6 1.4 1.2
0.8 0.6 0.4 0.2 0 -55 -35 -15 5 25 45 65 85 105 125
Vcutoff Vin
Voltage (V)
Voltage (V)
1.0
1.0 0.8 0.6 0.4 0.2 0 -60 -40
Vcutoff Vin
-20
0
20
40
60
80
100 120
Temperature (C)
Temperature (C)
Input/Output Voltage v Temperature
NPN
1.05 1.04 1.03 1.02
+25C
Input/Output Voltage v Temperature
PNP
1.05 1.04 1.03 1.02
25 C
Current Transfer
1.01 1.00 0.99 0.98 0.97 0.96 0.95 1m 1 10 100
10mA 1mA 100A
Current Transfer
1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.1 1 10
10mA 1mA 100A
Vce (V) - Collector-Emitter Voltage (V)
Vce - Collector-Emitter Voltage(V)
Current Transfer v Vce
Current Transfer v Vce
ISSUE 2 - JANUARY 2000 4
ZDS1009
PACKAGE DIMENSIONS
He E A A1
DIM Min A A1 0.02 0.24 6.3 3.3 6.7 0.9 -
Millimetres Typ 0.7 4.59 1.53 10 Max 1.7 0.1 0.32 6.7 3.7 7.3 15 Min 0.0008 0.009 0.248 0.130 0.264 0.035 -
Inches Typ 0.028 0.180 0.060 10 Max 0.067 0.004 0.013 0.264 0.145 0.287 15 -
5 6 3 8 1 7
e2
e1
4
b c D E e1 e2 He
o
2
45
Lp
c
Lp
ORDERING INFORMATION
DEVICE ZDS1009 PARTMARKING S1009
Zetex plc. Fields New Road, Chadderton, Oldham, OL9 8NP, United Kingdom. Telephone: (44)161 622 4422 (Sales), (44)161 622 4444 (General Enquiries) Fax: (44)161 622 4420 Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 Zetex Inc. 47 Mall Drive, Unit 4 Commack NY 11725 USA Telephone: (631) 543-7100 Fax: (631) 864-7630 Zetex (Asia) Ltd. 3510 Metroplaza, Tower 2 Hing Fong Road, Kwai Fong, Hong Kong Telephone:(852) 26100 611 Fax: (852) 24250 494 These are supported by agents and distributors in major countries world-wide (c) Zetex plc 2000 Internet http://www.zetex.com :
This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service.
ISSUE 2 - JANUARY 2000 5

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