Rainbow-electronics MAX8730 Manual do Utilizador descarregar pdf (Página 3)

MAX8730

Low-Cost Battery Charger

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1. V

SRC

= V

ASNS

= V

CSSP

= V

CSSN

= 18V, V

BATT

= V

CSIP

= V

CSIN

= 12V, V

VCTL

= V

ICTL

= 1.8V, MODE = float,

ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T

= 0°C to +85°C, unless otherwise noted. Typical values are at

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

ICTL falling 50 65 80

ICTL Power-Down Mode

Threshold

ICTL rising 70 90 110

ICTL

= 3V -1 +1

ICTL Input Bias Current

SRC = BATT, ASNS = GND, V

ICTL

= 5V

-1 +1

µA

CSSP-to-CSSN Full-Scale

Current-Sense Voltage

72.75 75.75 78.75

CLS

= REF (trim point)

-4 +4 %

50 53 56 mV

CLS

= REF x 0.7

-5.6

+5.6

36 38

40.5

Input Current-Limit Accuracy

CLS

= REF x 0.5

-6.6

+6.6

CSSP/CSSN Input Voltage Range

8.0 28 V

CSSP

= V

CSSN

= V

SRC

> 8.0V

400

800

CSSP/CSSN Input Current

SRC

= 0V 0.1 1

µA

CLS Input Range 1.1

REF

CLS Input Bias Current V

CLS

= 2.0V -1 +1 µA

IINP Transconductance V

CSSP

- V

CSSN

= 56mV

2.66

2.8

2.94

µA/mV

CSSP

- V

CSSN

= 100mV, V

IINP

= 0 to 4.5V -5 +5

CSSP

- V

CSSN

= 75mV -8 +8

CSSP

- V

CSSN

= 56mV -5 +5

IINP Accuracy

CSSP

- V

CSSN

= 20mV

-12.5

+12.5

IINP Gain Error Based on V

IC T L

RE F x 0.5 and V

IC T L

= RE F -7 +7 %

IINP Offset Error Based on V

IC T L

RE F x 0.5 and V

IC T L

= RE F -2 +2 mV

IINP Fault threshold IINP rising 4.1 4.2 4.3 V

SUPPLY AND LINEAR REGULATOR

SRC Input Voltage Range 8.0 28 V

SRC falling 7 7.4

SRC Undervoltage Lockout

Threshold

SRC rising 7.5 8

1 2 3 4 5 6 7 8 ... 28 29

Low-Cost Battery Charger 1

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