 English |
|
|
|
|
|
|
|
| LTC4020_15 Datasheet, PDF (3/42 Pages) Linear Technology – 55V Buck-Boost Multi-Chemistry Battery Charger | |||
| |||
| ◁ |
LTC4020
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). PVIN = SENSVIN = CSP = CSN = BAT = 20V, SHDN = 2V,
C(TG1, BG1, TG2, BG2) = 1000pF, VRNG/SS = 2V.
SYMBOL
INTVCC
PARAMETER
Boost Refresh Supply Voltage
Boost Refresh Supply Dropout
CONDITIONS
ILOAD = 5mA
PVIN = 4.5V; IINTVCC = 5mA
MIN TYP MAX UNITS
l 4.85
5.0
5.15
V
4.46
V
IPVIN
ISENSVIN
ISENSTOP
VFBMAX
SHDN
VSENS
ILIMIT
ITH
VC
DCMAX
fO
tON
tOFF
tTR
tNOL
Boost Refresh Supply Short-Circuit Current
Limit
PVIN Operating Current
Shutdown Current
SENSEVIN Operating Current
Shutdown Current
SENSETOP Operating Current
Shutdown Current
DC/DC Converter Reference
IC Enable Threshold (Rising)
Threshold Hysteresis
SHDN Pin Bias Current
DC/DC Converter Inductor Current Limit
(Average Value)
Reverse Current Inhibit
(Average Value)
Inductor Current Limit Programming
ILIMIT Pin Bias Current
Error Amp Current Limit
Error Amp Transconductance
High Side Current Sense Transconductance
Low Side Current Sense Transconductance
Maximum Duty Cycle
Switching Frequency
Minimum On Time
Minimum Off Time
Gate Drive Transition Time
Gate Drive Non-Overlap time
VINTVCC = 0V
Note 3; ITH = 0V
VSHDN = 0
VSHDN = 0
VSHDN = 0
Charging Terminated
VSENSVIN â VSENSTOP;
VSENSGND â VSENSBOT
VITH Falling (TG2 Disabled)
VITH Rising (TG2 Enabled)
VILIMIT = 0.5V; VILIMIT/VSENS(MAX)
VFBMAX = 0, VITH = 1.3V
VFBMAX = 2.75V; VITH = 1.3V
(VSENSVIN â VSENSETOP) to IVC
VC = 1.8V
(VSENSGND â VSENSEBOT) to IVC
VC = 1.8V
BG2: tON ⢠fO
RRT = 100k
RRT = 50k
RRT = 250k
BG2
TG1
TG1, BG1, TG2, BG2
(TG1 â SW1) to BG1,
(TG2 â SW2) to BG2
l 85
150
l
l
l
l
l 2.7
l 1.175
l 45
1.6
3
0.25
25
32.5
0.1
2.75
1.225
100
10
50
3
6
0.5
60
2.8
1.275
60
l
0
2
6
20
l 47.5
50
52.5
8
95
200
200
l 70
80
l 235
250
265
500
100
l
150
250
l
300
500
5
75
mA
mA
µA
mA
µA
µA
µA
V
V
mV
nA
mV
mV
mV
V/V
µA
µA
umho
umho
umho
%
kHz
kHz
kHz
ns
ns
ns
ns
For more information www.linear.com/LTC4020
4020fb
3
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese