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LTC4006 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC4006
Description  4A, High Efficiency, Standalone Li-Ion Battery Charger
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4006 Datasheet(HTML) 4 Page - Linear Technology

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4
LTC4006
4006fa
The
denotes specifications which apply over the full operating
temperature range (Note 4), otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT = 12V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Oscillator
fOSC
Regulator Switching Frequency
255
300
345
kHz
fMIN
Regulator Switching Frequency in Drop Out
Duty Cycle
≥ 98%
20
25
kHz
DCMAX
Regulator Maximum Duty Cycle
VCSP = VBAT
98
99
%
Gate Drivers (TGATE, BGATE)
VTGATE High (VCLN – VTGATE)ITGATE = –1mA
50
mV
VBGATE High
CLOAD = 3000pF
4.5
5.6
10
V
VTGATE Low (VCLN – VTGATE)CLOAD = 3000pF
4.5
5.6
10
V
VBGATE Low
IBGATE = 1mA
50
mV
TGATE Transition Time
TGTR
TGATE Rise Time
CLOAD = 3000pF, 10% to 90%
50
110
ns
TGTF
TGATE Fall Time
CLOAD = 3000pF, 10% to 90%
50
100
ns
BGATE Transition Time
BGTR
BGATE Rise Time
CLOAD = 3000pF, 10% to 90%
40
90
ns
BGTF
BGATE Fall Time
CLOAD = 3000pF, 10% to 90%
40
80
ns
VTGATE at Shutdown (VCLN – VTGATE)ITGATE = –1µA, DCIN = 0V, CLN = 12V
100
mV
VBGATE at Shutdown
IBGATE = 1µA, DCIN = 0V, CLN = 12V
100
mV
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: See Test Circuit
Note 3: Does not include tolerance of current sense resistor.
Note 4: The LTC4006E is guaranteed to meet performance specifications
from 0
°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
INFET Response Time to
Reverse Current
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)
4006 G01
LTC4006-2
INFET = 1/2 Si4925DY
Vgs = 0
Vs = 0V
Id = 0A
1.25
µs/DIV
VOUT vs IOUT
PWM Frequency vs Duty Cycle
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
4006 G03
PROGRAMMED CURRENT = 10%
DCIN = 15V
DCIN = 20V
DCIN = 24V
350
300
250
200
150
100
50
0
OUTPUT CURRENT (A)
0
0.5 1.0
2.0
3.0
4.0
1.5
2.5
3.5
4.5
4006 G02
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


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