Fujitsu MB3887 manual Parameter Sym Pin Conditions Value Unit Bol Min Typ

Page 10

MB3887

(Ta = +25 °C, VCC = 19 V, VCC (O) = 19 V, VREF = 0 mA)

Parameter

Sym-

Pin

Conditions

 

Value

 

Unit

 

 

 

bol

No.

Min

Typ

Max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+INC1 = +INC2 =

 

 

 

 

 

 

VOUTC1

2, 10

3 V to VCC,

1.9

2.0

2.1

V

 

 

 

 

ΔVin = −100 mV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+INC1 = +INC2 =

 

 

 

 

 

 

VOUTC2

2, 10

3 V to VCC,

0.34

0.40

0.46

V

 

Current detection

 

 

ΔVin = −20 mV

 

 

 

 

 

voltage

 

 

+INC1 = +INC2 =

 

 

 

 

 

 

VOUTC3

2, 10

0 V to 3 V,

1.8

2.0

2.2

V

 

 

 

 

ΔVin = −100 mV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+INC1 = +INC2 =

 

 

 

 

 

 

VOUTC4

2, 10

0 V to 3 V,

0.2

0.4

0.6

V

6.

 

 

 

ΔVin = −20 mV

 

 

 

 

 

 

 

 

 

 

 

 

Current

 

 

1,

 

 

 

 

 

detection

In-phase input

VCM

12,

0

VCC

V

amplifier block

voltage range

13,

 

 

 

 

 

 

[Current Amp1,

 

 

24

 

 

 

 

 

Current Amp2]

 

 

 

 

 

 

 

 

 

 

 

+INC1 = +INC2 =

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage gain

AV

2, 10

3 V to VCC,

19

20

21

V/V

 

 

 

 

ΔVin = −100 mV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frequency

BW

2, 10

AV = 0 dB

2*

MHz

 

bandwidth

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output voltage

VOUTCH

2, 10

4.7

4.9

V

 

 

 

 

 

 

 

 

 

VOUTCL

2, 10

20

200

mV

 

 

 

 

 

 

 

 

 

 

 

 

Output source

ISOURCE

2, 10

OUTC1 = OUTC2 = 2 V

2

1

mA

 

current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output sink cur-

ISINK

2, 10

OUTC1 = OUTC2 = 2 V

150

300

A

 

rent

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.

 

VTL

5, 7,

Duty cycle = 0 %

1.4

1.5

V

PWM

 

 

15

 

 

 

 

 

comparator

Threshold voltage

 

 

 

 

 

 

 

 

5, 7,

 

 

 

 

 

block

 

VTH

Duty cycle = 100 %

2.5

2.6

V

[PWM Comp.]

 

 

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* : Standard design value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Continued)

10

Image 10
Contents Description FeaturesPackage MB3887 PIN Assignment TOP ViewPin No Symbol Descriptions PIN DescriptionBlock Diagram Parameter Symbol Conditions Rating Unit Min Max Absolute Maximum RatingsParameter Symbol Conditions Value Unit Min Typ Recommended Operating ConditionsParameter Sym Pin Conditions Electrical CharacteristicsBol Min Typ Parameter Sym Pin Conditions Value Unit Bol Min Typ Max Parameter Sym Pin Conditions Value Unit Bol Min Typ OUT = −45 mA Output block Resistor Typical Characteristics Triangular wave oscillation frequency fOSC kHz Error amplifier gain and phase vs. Frequency Gain a Power dissipation vs. Ambient temperature Functional Description Output block OUT PowerPWM comparator block PWM Comp Control block CTLMethod of Setting the Triangular Wave Oscillation Frequency Setting the Charging VoltageMethod of Setting the Charging Current Soft-start block SoftMethod of Setting the SOFT-START Time Operation Timing Diagram AC Adaptor Voltage DetectionProcessing Without Using the Current AMP Connection when Current Amp is not usedProcessing Without Using of the Error AMP Connection when Error Amp is not usedProcessing Without Using of the CS Terminal Connection when soft-start time is not specifiedApplication Example At 4 cellParts List Parts NoReference Data Batt Vbatt mV Ta = +25 C, VIN = 19 Batt = 12 Ω Ordering Information Usage PrecautionsPart number Package Remarks Package Dimension IndexFujitsu Limited