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LTC4008 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC4008
Description  4A, High Effi ciency, Multi-Chemistry Battery Charger
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4008 Datasheet(HTML) 5 Page - Linear Technology

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LTC4008
5
4008fb
TYPICAL PERFORMANCE CHARACTERISTICS
INFET Response Time to
Reverse Current
VFB vs DCIN
BATMON Offset
(TA = 25°C unless otherwise noted)
TEST PERFORMED ON DEMOBOARD
VIN = 15VDC
CHARGER = ON
ICHARGE = <10mA
Vs OF PFET (5V/DIV)
Id (REVERSE) OF
PFET (5A/DIV)
Vgs OF PFET (2V/DIV)
4008 G01
VCHARGE = 12.6V
INFET = 1/2 Si4925DY
Vgs = 0
Vs = 0V
Id = 0A
1.25μs/DIV
DCIN (V)
6
11162126
4008 G02
0.05
0
–0.05
–0.10
–0.15
–0.20
BATTERY VOLTAGE (V)
3
8
13
18
23
4008 G03
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
DCIN = 15V
DCIN = 20V
DCIN = 24V
BATMON LOAD = 100kΩ
VOUT vs IOUT
PWM Frequency vs Duty Cycle
Disconnect/Reconnect Battery
(Load Dump)
OUTPUT CURRENT (A)
0
0.5 1.0
2.0
3.0
4.0
1.5
2.5
3.5
4.5
4008 G04
DCIN = 20V
VBAT = 12.6V
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
–5.0
DUTY CYCLE (VOUT/VIN)
0
0.1 0.2
0.4
0.6
0.9
0.8
0.3
0.5
0.7
1.0
4008 G05
PROGRAMMED CURRENT = 10%
DCIN = 15V
DCIN = 20V
DCIN = 24V
350
300
250
200
150
100
50
0
4008 G06
LOAD CURRENT = 1A, 2A, 3A
DCIN = 20V
VFLOAT = 12.6V
VFLOAT
1V/(DIV)
LOAD
STATE
DISCONNECT
RECONNECT
1A STEP
3A STEP
3A STEP
1A STEP


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