LT1513CR Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LT1513CR

SEPIC Constant- or Programmable-Current/Constant-Voltage Battery Charger

Linear Technology 

LT1513/LT1513-2

ELECTRICAL CHARACTERISTICS

VIN = 5V, VC = 0.6V, VFB = VREF, IFB = 0V, VSW and S/S pins open, unless otherwise noted.

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

Error Amplifier Clamp Voltage

AV

Error Amplifier Voltage Gain

VC Pin Threshold

f

Switching Frequency

Maximum Switch Duty Cycle

High Clamp, VFB = 1V

Low Clamp, VFB = 1.5V

Duty Cycle = 0%

2.7V ≤ VIN ≤ 25V

0°C ≤ TJ ≤ 125°C

TJ < 0°C

1.70

1.95

2.30

V

0.25

0.40

0.52

V

500

V/ V

0.8

1

1.25

V

450

500

550

kHz

430

500

580

kHz

400

580

kHz

q 85

95

%

Switch Current Limit Blanking Time

130

260

ns

BV

Output Switch Breakdown Voltage

0°C ≤ TJ ≤ 125°C

TJ < 0°C

40

47

V

35

V

VSAT

Output Switch ON Resistance

ILIM

Switch Current Limit

ISW = 2A

Duty Cycle = 50%

Duty Cycle = 80% (Note 1)

q

0.25

0.45

Ω

q 3.0

3.8

5.4

A

q 2.6

3.4

5.0

A

∆IIN/∆ISW Supply Current Increase During Switch ON Time

Control Voltage to Switch Current

Transconductance

15

25

mA/A

4

A/ V

Minimum Input Voltage

q

2.4

2.7

V

IQ

Supply Current

Shutdown Supply Current

Shutdown Threshold

Shutdown Delay

2.7V ≤ VIN ≤ 25V

q

4

5.5

mA

2.7V ≤ VIN ≤ 25V, VS/S ≤ 0.6V, TJ ≥ 0°C q

TJ < 0°C

12

30

µA

50

µA

2.7V ≤ VIN ≤ 25V

q 0.6

1.3

2

V

q5

12

25

µs

S/S Pin Input Current

Synchronization Frequency Range

0V ≤ VS/S ≤ 5V

q – 10

q 600

15

µA

800

kHz

The q denotes specifications which apply over the full operating

temperature range.

Note 1: For duty cycles (DC) between 50% and 85%, minimum

guaranteed switch current is given by ILIM = 1.33 (2.75 – DC).

Note 2: The IFB pin is servoed to its regulating state with VC = 0.8V.

Note 3: Consult factory for grade selected parts.

Note 4: The IFB pin is sevoed to regulate FB to 1.245V

3

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