MAX8900B(2010) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX8900B
(Rev.:2010)

1.2A Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring

Maxim Integrated 

1.2A Switch-Mode Li+ Chargers with ±22V Input

Rating and JEITA Battery Temperature Monitoring

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VIN = 6V, VBAT = 3.6V, TA = +25NC, unless otherwise noted.)

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

4

SWITCHING FREQUENCY

vs. INPUT VOLTAGE

VBAT = 4V

VBAT = 3V

MAX8900x

VIN RISING

VOVLO = 28V

VCEN = 0V

RISET = 2.87kI

8 12 16 20 24 28

INPUT VOLTAGE (V)

MAX8900B DC SWITCHING

WAVEFORMS (IBAT = 100mA)

MAX8900A toc12

VOUT

20mV/div

VLX

5V/div

0V

ILX

200mA/div

0A

200ns/div

MAX8900B DC SWITCHING

WAVEFORMS (IBAT = 1.2A)

MAX8900A toc14

VOUT

20mV/div

VLX

5V/div

0V

ILX

500mA/div

0A

200ns/div

SWITCHING FREQUENCY

vs. CHARGE CURRENT

6

5

4

3

VIN = 5V, VBAT = 3V

2

VIN = 6V, VBAT = 4V

VIN = 4.5V, VBAT = 4V

1

0

0 0.2 0.4 0.6 0.8 1.0 1.2

CHARGE CURRENT (A)

MAX8900B DC SWITCHING

WAVEFORMS (IBAT = 440mA)

MAX8900A toc13

VOUT

20mV/div

VLX

5V/div

0V

ILX

500mA/div

0A

200ns/div

CHARGE CURRENT

vs. AMBIENT TEMPERATURE

1.4

VTHM = VAVL/2

1.2

RSETI = 2.87kI

1.0

0.8

0.6 RSETI = 6.81kI

0.4

0.2

0

-40 -15 10 35 60 85 110 135 160 185

TA (°C)

9

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