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13
KX-NSX1000/KX-NSX2000
4.3.4.
Output Voltage Section
Describes the circuit that converts main converter output to 15V.
15V Output Voltage Section
(1) 15V Output Converter Section
15V Output Voltage Section
(1) 15V Output Converter Section
The 15V output converter section is a separately-excited chopper step-down converter consisting primarily of IC101, D109,
L101, C121, C122 and R116-R118.
Inputs 32V output described in Part 2 as input power source.
Provides 15V by IC101 and D109 on/off switching and L101/C121, C122 smoothing circuit.
Output voltage is determined by resistance ratio of IC101 and R116-R118.
IC101 oscillation frequency is 300 kHz (typ.).
L101, C121, C122 and R116-R118.
Inputs 32V output described in Part 2 as input power source.
Provides 15V by IC101 and D109 on/off switching and L101/C121, C122 smoothing circuit.
Output voltage is determined by resistance ratio of IC101 and R116-R118.
IC101 oscillation frequency is 300 kHz (typ.).
(2) 15V Output Overcurrent Protection Section
Protection is provided by overcurrent protection circuit in IC101.
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