MB3878PFV View Datasheet(PDF) - Fujitsu

Part Name

Description

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MB3878PFV

DC/DC Converter IC for Charging

Fujitsu 

MB3878

(Continued)

Parameter

Symbol

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

Pin

No.

Conditions

Min.

Value

Typ.

Unit

Max.

Output voltage

Current detection

amplifier block

(Current Amp.1,

Current Amp.2)

Output source

current

Output sink

current

VOUTCH 2, 10



4.7

VOUTCL 2, 10





ISOURCE 2, 10 OUTC1 = OUTC2 = 2 V 

ISINK 2, 10 OUTC1 = OUTC2 = 2 V 150

4.9



V

20

200 mV

−2.0 −0.6 mA

300

 µA

PWM comparator

VTL

5, 7,

15

Duty cycle = 0 %

block

Threshold voltage

(PWM Comp.)

VTH

5, 7,

15

Duty cycle = 100 %

1.4

1.5



V



2.5

2.6 V

Output source

current

ISOURCE

20

OUT = 11 V, Duty ≤ 5 %

(t = 1 / fOSC × Duty)



−200*



mA

Output sink

current

ISINK

20

OUT = 16 V, Duty ≤ 5 %

(t = 1 / fOSC × Duty)



200*  mA

Output block

(OUT)

Output ON

resistor

ROH 20 OUT = −45 mA

ROL 20 OUT = 45 mA



8.0 12.0 Ω



6.5

9.7 Ω

Rise time

tr1

20

OUT = 3300 pF

(equivalent to Si4435 × 1)



70*

 ns

Fall time

tf1

20

OUT = 3300 pF

(equivalent to Si4435 × 1)



60*

 ns

Control block

(CTL)

CTL input voltage

Input current

VON

VOFF

ICTLH

ICTLL

14 Active mode

14 Standby mode

14 CTL = 5 V

14 CTL = 0 V

2



25 V

0



0.8 V



100 200 µA



0

1 µA

Bias voltage

block (VH)

Output voltage

VCC = VCC (O)

VH 19 = 7 V to 25 V,

VH = 0 to 30 mA

VCC −

5.5

VCC −

5.0

VCC −

4.5

V

General

Standby current

Power supply

current

ICCS

18, VCC = VCC (O) ,

19 CTL = 0 V

ICC

18, VCC = VCC (O) ,

19 CTL = 5 V



0

10 µA



8.0 12.0 mA

* : Standard design value

8

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