MB3887_06 Datasheet, PDF (12/34 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. Ambient temperature
320
315
VCC = 19 V
310
CTL = 5 V
305
RT = 47 kΩ
300
295
290
285
280
275
270
265
260
−40 −20 0 +20 +40 +60 +80 +100
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. Ambient temperature
4.25
2.24
VCC = 19 V
CTL = 5 V
4.23
2.22
4.21
4.20
4.19
4.18
4.17
4.16
4.15
−40 −20 0 +20 +40 +60 +80 +100
Ambient temperature Ta ( °C)
(Continued)
12