Rainbow-electronics MAX1870A Manuel d'utilisateur télécharger pdf (Page 5)

MAX1870A

Step-Up/Step-Down

Li+ Battery Charger

_______________________________________________________________________________________ 5

PARAMETER CONDITIONS

MIN

TYP

MAX

UNITS

CLS

= REF, V

CSSP

- V

CSSN

= 102mV, V

CSSP

= V

CSSS

1.2

1.7

2.2

GMS Amplifier Loop

Transconductance

CLS

= REF, V

CSSP

- V

CSSS

= 102mV, V

CSSP

= V

CSSN

1.2

1.7

2.2

µA/mV

VCTL = REFIN, V

BATT

= 15.8V 50

CCV Output Current

VCTL = REFIN, V

BATT

= 17.8V -50

µA

ICTL = REFIN, V

CSIP

- V

CSIN

= 0mV 150

CCI Output Current

ICTL = REFIN, V

CSIP

- V

CSIN

= 150mV

-150

µA

CLS = REF, V

CSSP

= V

CSSN

, V

CSSP

= V

CSSS

100

CCS Output Current

CLS = REF, V

CSSP

- V

CSSN

= 200mV,

CSSP

- V

CSSS

= 200mV

-100

µA

CCI/CCS/CCV Clamp Voltage

1.1V < V

CCV

< 3.5V, 1.1V < V

CCS

< 3.5V,

1.1V < V

CCI

< 3.5V

100

300

500 mV

LOGIC LEVELS

ASNS Output-Voltage Low V

IINP

= GND,

SINK

= 1mA 0.4 V

ASNS Output-Voltage High V

IINP

= 4V, I

SOURCE

= 1mA

LDO -

0.5

IINP

rising 1.1

1.15

1.2 V

ASNS Current Detect

Hysteresis 50 mV

SHDN

= 0 to V

REFIN

-1 +1

SHDN Input Bias Current

DCIN = 0, V

REFIN

= 5V, V

SHDN

= 0 to V

REFIN

-1 +1

µA

SHDN Threshold SHDN falling, V

REFIN

= 2.8V to 3.6V 22

23.5

% of

REFIN

SHDN Hysteresis 1

% of

REFIN

CELLS Input Low Voltage

0.75

CELLS Float Voltage 40 50 60

% of

REFIN

CELLS Input High Voltage

RE FIN -

0.75V

CELLS Input Bias Current CELLS = 0 to REFIN -2 +2 µA

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 2, V

DCIN

= V

CSSP

= V

CSSN

= V

CSSS

= V

VHP

= 18V, V

BATT

= V

CSIP

= V

CSIN

= V

BLKP

= 12V, V

REFIN

= 3.0V, V

ICTL

0.75 x V

REFIN

, VCTL = LDO, CELLS = FLOAT, GND = PGND = 0, V

DLOV

= 5.4V, T

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

values are at T

= +25°C.)

1 2 3 4 5 6 7 8 9 10 ... 31 32

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Rainbow-electronics MAX1870A Manuel d'utilisateur Page 5

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