LLTC4100EG Просмотр технического описания (PDF) - Linear Technology

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производитель

LLTC4100EG

Smart Battery Charger Controller

Linear Technology 

LTC4100

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VDCIN = 20V, VDD = 3.3V, VBAT = 12V unless otherwise noted. (Note 4)

SYMBOL PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Current Sense Amplifier, CA1

Input Bias Current into BAT Pin

11.66

µA

CMSL CA1/I1 Input Common Mode Low

CMSH CA1/I1 Input Common Mode High

VDCIN ≤ 28V

Current Comparators ICMP and IREV

ITMAX

Maximum Current Sense Threshold (VCSP–VBAT) VITH = 2.5V

ITREV

Reverse Current Threshold (VCSP–VBAT)

Current Sense Amplifier, CA2

●

0

●

V

VCLN – 0.2

V

● 140 165

200

mV

– 30

mV

Transconductance

1

mmho

Source Current

Sink Current

Current Limit Amplifier

Measured at ITH, VITH = 1.4V

Measured at ITH, VITH = 1.4V

– 40

µA

40

µA

Transconductance

1.5

mmho

VCLP

Current Limit Threshold

ICLN

CLN Input Bias Current

Voltage Error Amplifier, EA

● 93

100

107

mV

100

nA

Transconductance

1

mmho

OVSD

Sink Current

Measured at ITH, VITH = 1.4V

Overvoltage Shutdown Threshold as a Percent of

Programmed Charger Voltage

36

µA

● 102 107

110

%

Input P-Channel FET Driver (INFET)

DCIN Detection Threshold (VDCIN–VCLP)

DCIN Voltage Ramping Up from VCLP–0.05V ●

0

0.17 0.25

V

Forward Regulation Voltage (VDCIN–VCLP)

●

25

50

mV

Reverse Voltage Turn-Off Voltage (VDCIN–VCLP)

● –60 –25

mV

INFET ON Clamping Voltage (VDCIN–VINFET)

IINFET = 1µA

●

5

5.8

6.5

V

INFET OFF Clamping Voltage (VDCIN–VINFET)

IINFET = –25µA

0.25

V

Oscillator

fOSC

Regulator Switching Frequency

fMIN

Regulator Switching Frequency in Drop Out

DCMAX Regulator Maximum Duty Cycle

Gate Drivers (TGATE, BGATE)

Duty Cycle ≥ 98%

VCSP = VBAT

255 300

345

kHz

20

25

kHz

98

99

%

TGTR

TGTF

BGTR

BGTF

VTGATE High (VCLP-VTGATE)

VBGATE High

VTGATE Low (VCLP-VTGATE)

VBGATE Low

TGATE Transition Time

TGATE Rise Time

TGATE Fall Time

BGATE Transition Time

BGATE Rise Time

BGATE Fall Time

VTGATE at Shutdown (VCLN-VTGATE)

VBGATE at Shutdown

ITGATE = –1mA

CLOAD = 3000pF

CLOAD = 3000pF

IBGATE = 1mA

CLOAD = 3000pF, 10% to 90%

CLOAD = 3000pF, 10% to 90%

CLOAD = 3000pF, 10% to 90%

CLOAD = 3000pF, 10% to 90%

ITGATE = –1µA

ITGATE = 1µA

50

mV

4.5 5.6

10

V

4.5 5.6

10

V

50

mV

50

110

ns

50

100

ns

40

90

ns

40

80

ns

100

mV

100

mV

4100fc

For more information www.linear.com/LTC4100

3

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