MB3887 Datasheet, PDF (13/33 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion battery

MB3887
Triangular wave oscillation frequency
vs. Timing resistor
1M
Ta = +25 °C
VCC = 19 V
CTL = 5 V
100 k
10 k
10
100
1000
Timing resistor RT (kΩ)
Triangular wave oscillation frequency
vs. Operating ambient temperature
320
315
310
305
300
295
290
285
280
275
270
265
260
−40 −20 0
VCC = 19 V
CTL = 5 V
RT = 47 kΩ
20 40 60 80 100
Operating ambient temperature Ta ( °C)
Triangular wave oscillation frequency
vs. Power supply voltage
340
330
320
310
300
290
280
270
260
0
Ta = +25 °C
CTL = 5 V
RT = 47 kΩ
5
10
15
20
25
Power supply voltage VCC (V)
Error amplifier threshold voltage
vs. Operating ambient temperature
4.25
2.24
4.23
2.22
4.21
4.20
4.19
4.18
4.17
4.16
4.15
−40 −20 0
VCC = 19 V
CTL = 5 V
20 40 60 80 100
Operating ambient temperature Ta ( °C)
(Continued)
13