MB3883 Datasheet, PDF (25/39 Pages) Fujitsu Component Limited. – 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down

MB3883
s SETTING THE OUTPUT CURRENT
The output circuit (drive 6) is structured as illustrated below (in the output circuit diagram). As found in “Output
Current Waveform” below, the source current value of the output current waveform has a constant current setting.
Note that the source current is set by the following equation:
• Output source current = (VB / RB) × 80 (A)
42 VCC (O)
Source current
I
80 I
External NPN transistor
× 33
Output source
current
47 _OUT6
Output sink
current
Sink current
× 33
70 kΩ
0.6 V
RB6
48
44 GND (O)
RB
VB
In the output circuit diagram
Output source current (Peak)
Output source
current
0
Output sink current (Peak)
t
Output current waveform
25