LT1769IGN datasheet(4/16 Pages) LINER

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LT1769

ELECTRICAL CHARACTERISTICS

TYPICAL PERFORMANCE CHARACTERISTICS

Efficiency of Figure 1 Circuit

IBAT (A)

0.2

100

1.0

1.8

2.2

1769 G01

0.6

1.4

VIN = 16.5

VBAT = 8.4V

CHARGER EFFICIENCY

INCLUDES LOSS

IN DIODE D3

VCC (V)

7.0

6.5

6.0

5.5

5.0

4.5

1769 G03

TJ = 125°C

TJ = 25°C

TJ = 0°C

MAXIMUM DUTY CYCLE

ICC vs Duty Cycle

DUTY CYCLE (%)

1030

5070

1769 G02

TJ = 125°C

TJ = 0°C

TJ = 25°C

VCC = 16V

ICC vs VCC

The q denotes specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 16V, VBAT = 8V. No load on any outputs unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Voltage Amplifier VA

Transconductance (Note 3)

Output Current from 50

µA to 500µA

0.25

0.6

1.3

mho

Output Source Current

VOVP = VREF + 10mV, VPROG = VREF + 10mV

1.1

OVP Input Bias Current

VA Output Current at 0.5mA

±3

±10

VA Output Current at 0.5mA, TA > 90°C

–15

Current Limit Amplifier CL1, 8V

≤ Input Common Mode

Turn-On Threshold

0.5mA Output Current

100

107

Transconductance

Output Current from 50

µA to 500µA

0.5

mho

CLP Input Current

0.5mA Output Current, VUV ≥ 0.4V

0.3

µA

CLN Input Current

0.5mA Output Current VUV ≥ 0.4V

0.8

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: Tested with Test Circuit 1.

Note 3: Tested with Test Circuit 2.

Note 4: A linear interpolation can be used for reference voltage

specification between 0

°C and –40°C.

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