MB3875_03 Datasheet, PDF (11/26 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging

MB3875/3877
(Continued)
Triangular wave oscillator frequency vs.
timing resistor
1M
Ta = +25 °C
VCC = 16 V (MB3875)
VCC = 19 V (MB3877)
CTL = 5 V
100 k
10 k
10 k
100 k
1M
Timing resistor RT (Ω)
Triangular wave oscillator frequency vs.
ambient temperature
350
340
330
320
310
300
290
280
270
260
250
−40 −20 0
VCC = 16 V (MB3875)
VCC = 19 V (MB3877)
CTL = 5 V
RT = 47 kΩ
20 40 60 80 100
Ambient temperature Ta (°C)
Triangular wave oscillator frequency vs.
power supply voltage
350
340
330
320
310
300
290
280
270
260
250
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
5.0
4.0
3.0
2.0
1.0
0.0
−1.0
−2.0
−3.0
−4.0
−5.0
−40 −20 0
VCC = 16 V (MB3875)
VCC = 19 V (MB3877)
CTL = 5 V
20 40 60 80 100
Ambient temperature Ta (°C)
11