MB3878 Datasheet, PDF (8/24 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging

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