Rainbow-electronics MAX781 Bedienungsanleitung PDF herunterladen (Seite 5)

MAX781

PDA/Hand-Held Computer Power Controller

_______________________________________________________________________________________ 5

TIMING CHARACTERISTICS (Note 1)

Note 1: Guaranteed by design.

PARAMETER MIN TYP MAX UNITS

CE Assertion to DOUT Enable 120 ns

SCLK Low Pulse Width 125 ns

SCLK High Pulse Width 125 ns

SCLK Clock Period 400 ns

CE Deassertion to DOUT Disable 120 ns

DIN to SCLK Data Hold Time

DIN to SCLK Data Setup Time 125 ns

0 ns

SCLK to DOUT Valid Propagation Delay 30 200 ns

SYMBOL

SCLK Rising Edge to CE Deassertion 200 ns

CE Assertion to SCLK Rising-Edge

Setup Time

200 ns

CE High Pulse Width 300 ns

SCLK Rising Edge to CE Assertion 200 ns

CSH

CSS

CSW

CS0

CE Deassertion to SCLK Rising Edge 200 nst

CS1

__________________________________________Typical Operating Characteristics

= +25°C, unless otherwise noted.)

0.1

0.01

0.001

2 4 6 8 10 12 14 16 18



NO LOAD SUPPLY CURRENT

MAX781-01

BATT INPUT VOLTAGE (V)

QUIESCENT CURRENT (mA)

3OUT

=0mA)

SYNC=UVLO=AGND,

CHARGE=0

GDSEL_=0

MUX_=0

5ON=1

VPP_=0

SHUTDOWN MODE

LOW-POWER MODE

STANDBY MODE

OPERATE MODE (IDLE = 1)

OPERATE MODE (IDLE = 0)



CHARGER OUTPUT CURRENT

MAX781-03

CHARGER CODE (CHG6–CHG0 VALUE)

CURRENT INTO BATT (mA)

100

1000

EFFICIENCY (%)

100

3 7 15 31 12763

R4 = 0.2Ω

SYNC = AGND

BATT = 7V TO 8V

VCHG = 12V

1 2 3 4 5 6 7 8 9 10 ... 23 24

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