MAX1772(2002) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX1772
(Rev.:2002)

Low-Cost, Multichemistry Battery Charger Building Block

Maxim Integrated 

Low-Cost, Multichemistry Battery-

Charger Building Block

Typical Operating Characteristics

(Circuit of Figure 1a, VDCIN = 20V, TA = +25°C, unless otherwise noted.)

LOAD-TRANSIENT RESPONSE

(BATTERY REMOVAL AND REINSERTION)

MAX1772 toc01

CCV

CCI

1ms/div

BATTERY PRESENT

ICTL = 0.957V

VCTL = 3.3V

VBATT

20V/div

IBATT

2A/div

CCI

500mV/div

CCV

500mV/div

LINE-TRANSIENT RESPONSE

MAX1772 toc03

DCIN

10V/div

VBATT

(AC-COUPLED)

100mV/div

2ms/div

VBATT = 16V

DCIN = 18.5V TO 27.5V

ILOAD = 150mA

LOAD-TRANSIENT RESPONSE

(STEP-IN LOAD CURRENT)

MAX1772 toc02

CCS

CCI

500mV/div

CCS

CCI

500mV/div

VBATT

20V/div

ILOAD

2A/div

1ms/div

ICTL = 3.30V

CHARGING CURRENT = 2.0A

VBATT = 16V

LOAD STEP = 0 TO 3A

ISOURCE LIMIT = 5A

LDO LOAD REGULATION

0.4

VCTL = 0

0.3 ICTL = 3.3V

DCIN = 20.0V

0.2 LDO = 5.40V

0.1

0

-0.1

-0.2

-0.3

-0.4

0 1 2 3 4 5 6 7 8 9 10

LDO CURRENT (mA)

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