Datasheet

LTC4007
5
4007fc
TYPICAL PERFORMANCE CHARACTERISTICS
PWM Frequency vs Duty Cycle
Disconnect/Reconnect Battery
(Load Dump) 1A Load Step (Battery Present)
1A Load Step
(Battery Not Present)
Battery Leakage Current
vs Battery Voltage
INFET Response Time to
Reverse Current Line Regulation V
OUT
vs I
OUT
TEST PERFORMED ON DEMOBOARD
V
IN
= 15VDC
CHARGER = ON
I
CHARGE
= <10mA
V
s
OF PFET (5V/DIV)
I
d
(REVERSE) OF
PFET (5A/DIV)
V
gs
OF PFET (2V/DIV)
4007 G01
V
CHARGE
= 12.6V
PFET = 1/2 Si4925DY
V
gs
= 0
V
s
= 0V
I
d
= 0A
1.25μs/DIV
VDCIN (V)
13 15 17 21 25 2919 23 27 31
V
OUT
ERROR (%)
4007 G02
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
–0.40
–0.45
C3C4 = GND
C3C4 = OPEN
OUTPUT CURRENT (A)
0 0.5 1.0 2.0 3.0 4.01.5 2.5 3.5 4.5
OUTPUT VOLTAGE ERROR (%)
4007 G03
3C4C = GND
3C4C = OPEN
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
–5.0
DUTY CYCLE (V
OUT
/V
IN
)
0 0.1 0.2 0.4 0.6 0.90.80.3 0.5 0.7 1.0
PWM FREQUENCY (kHz)
4007 G04
PROGRAMMED CURRENT = 10%
DCIN = 15V
DCIN = 20V
DCIN = 24V
350
300
250
200
150
100
50
0
4007 G05
LOAD CURRENT = 1A, 2A, 3A
DCIN = 20V
V
FLOAT
= 12.6V (3C4C = GND, CHEM = OPEN)
V
FLOAT
1V/DIV
LOAD
STATE
DISCONNECT
1A STEP
3A STEP
RECONNECT
3A STEP
1A STEP
DCIN = 20V
V
FLOAT
= 12.6V
OUTPUT VOLTAGE (500mV/DIV)
CHARGER CURRENT (1A/DIV)
4007 G06
DCIN = 20V
V
FLOAT
= 12.6V
OUTPUT VOLTAGE (5V/DIV)
CHARGER CURRENT (500mA/DIV)
4007 G07
BATTERY VOLTAGE (V)
0 5 10 15 20 25 30
BATTERY LEAKAGE CURRENT (μA)
4007 G08
40
35
30
25
20
15
10
5
0
VDCIN = 0V