Rainbow-electronics MAX8730 Manual de usuario descargar pdf (Pagina 7)

MAX8730

Low-Cost Battery Charger

_______________________________________________________________________________________ 7

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

INPUT-CURRENT REGULATION

CSSP-to-CSSN Full-Scale

Current-Sense Voltage

72.75

78.25

CLS

= REF (trim point)

72.75

78.25

CLS

= REF x 0.7

50.0

56.0

mVInput Current-Limit Accuracy

CLS

= REF x 0.5

36.00

40.50

CSSP/CSSN Input Voltage Range

8.0 28 V

CSSP/CSSN Input Current V

CSSP

= V

CSSN

= V

SRC

> 8.0V

1000

µA

CLS Input Range 1.1

REF

IINP Transconductance V

CSSP

- V

CSSN

= 56mV

2.66

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

I C T L

RE F x 0.5 and V

I C T L

= RE F

-7 +7 %

IINP Offset Error

Based on V

I C T L

RE F x 0.5 and V

I C T L

= RE F

-2 +2 mV

IINP Fault Threshold IINP rising 4.1 4.3 V

SUPPLY AND LINEAR REGULATOR

SRC Input Voltage Range 8.0 28 V

SRC falling 7

SRC Undervoltage Lockout

Threshold

SRC rising 8

Normal mode 6 mA

INPON =

REFON

= low

INPON = low,

REFON

= high

600

INPON = high,

REFON

= low

600

SRC Quiescent Current

(INPON/REFON = Don’t Care)

SRC

= V

BATT =

12V, ASNS =

GND

(Note 2)

INPON =

REFON

= high

600

µA

BATT Input Current

BATT

= 2V to 19V, V

SRC

> V

BATT

+ 0.3V

600 µA

REFON

= 5.4V

600

Battery Leakage Current

CSIP

+ I

CSIN

+ I

BATT

+ I

CSSP

+ I

CSSN

+ I

SRC

ASNS = REFON = GND

INPON = GND

µA

LDO Output Voltage 8.0V < VSRC < 28V, no load 5.2 5.5 V

LDO Load Regulation 0 < I

LDO

< 10mA 50 mV

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

= -40°C to +85°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 11 12 ... 28 29

Low-Cost Battery Charger 1

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Rainbow-electronics MAX8730 Manual de usuario Pagina 7

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