MAX1870A Просмотр технического описания (PDF) - Maxim Integrated

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MAX1870A

Step-Up / Step-Down Li+ Battery Charger

Maxim Integrated 

Step-Up/Step-Down

Li+ Battery Charger

Typical Operating Characteristics

(Circuit of Figure 1, VDCIN = 16V, CELLS = REFIN, VCLS =VREF, VICTL = VREFIN = 3.3V, TA = +25°C, unless otherwise noted.)

BATTERY INSERTION AND REMOVAL

BATTERY REMOVAL

BATTERY

INSERTION

CCV

CCI

CCI CCV

2.00ms/div

20V

18V

VBATT

16V

ICHARGE

5A/div

0

4V

CCI AND CCV

2V

0

BATTERY-REMOVAL RESPONSE

RCV = 10kΩ, COUT = 22µF

RCV = 10kΩ, COUT = 44µF

RCV = 20kΩ, COUT = 44µF

21V

20V

19V

VBATT

18V

17V

16V

10.0µs/div

SYSTEM LOAD-TRANSIENT RESPONSE

STEP-DOWN MODE

200µs

5A

SYSTEM LOAD

0A

4A

2A

INDUCTOR CURRENT

0A

5A

INPUT CURRENT

0A

2A

BATTERY CURRENT

0A

SYSTEM LOAD-TRANSIENT RESPONSE

HYBRID MODE

100µs

5A

SYSTEM LOAD

0A

4A

2A

INDUCTOR CURRENT

0A

5A

INPUT CURRENT

0A

2A

BATTERY CURRENT

0A

CHARGE-CURRENT STEP RESPONSE

STEP-DOWN

MODE

5V

VICTL

0V

2A

INDUCTOR CURRENT

0A

1V

CCI

0V

2A

BATTERY CURRENT

0A

400µs

CHARGE-CURRENT STEP RESPONSE

HYBRID MODE

5V

VICTL

0V

2A

INDUCTOR CURRENT

0A

1V

CCI

0V

2A

BATTERY CURRENT

0A

400µs

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