Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b
1.5Watt BLA05 Series
7-3 Output voltage adjustment
7-3-1 Short circuit Vadj and –Vout terminal
Output voltage can be set in maximum as per the following table by short-circuiting Vadj and –Vout
terminals. In case of no variable output voltage, open the terminal.
Output voltage for the connection of Vadj terminal
Short-circuit
Model name
Open
with -Vout
BLA05-05S30
BLA05-12S12
BLA05-12W06
5.0V
12.0V
±12.0V
6.0V
15.0V
±15.0V
7-3-2 Resistor adjustment control
The output voltage is adjustable by inserting a resistor between Vadj terminal and +Vout terminal or
–Vout terminal.
To decrease the output voltage
To increase the output voltage
To decrease the output voltage
To increase output voltage
Model name
Output voltage: Vo[V]，Connecting
Output voltage: Vo[V]，Connecting
resistor: Rb[kΩ]
resistor: Ra[kΩ]
Vo = (2490 Rb + 7221) / (500 Rb + 1700)
Rb = (7221 − 1700 Vo) / (500 Vo − 2490)
Variable range: Vo=4.75V min.
Vo = (2490 Ra + 7221) / (500 Ra + 1200)
Ra = (7221 − 1200 Vo) / (500 Vo − 2490)
Variable range: Vo=6.0V max.
BLA05-05S30
BLA05-12S12
BLA05-12W06
Vo = (2996 Rb + 17643) / (250 Rb + 2605)
Rb = (17643 − 2605 Vo) / (250 Vo − 2996)
Variable range: Vo=11.4V min.
Vo = (2996 Ra + 17643) / (250 Ra + 1175)
Ra = (17643 − 1175 Vo) / (250 Vo − 2996)
Variable range: Vo=15.0V max.
Vo = (10607 Rb + 67006) / (440 Rb + 12012) Vo = (2652 Ra + 26977) / (110 Ra + 902)
Rb = (67006 − 12012 Vo) / (440 Vo − 10607) Ra = (26977 − 902 Vo) / (110 Vo − 2652)
Variable range: Vo=22.8V min. (±11.4V min.) Variable range: Vo=30.0V max. (±15.0V max.)
Note) If output voltage is made variable, use at the maximum power (1.5W) or less.
If output voltage is made lower, do not connect Rb with resistor which is less than Vo min. setting
resistor value.
8
DC-DC Converter
BDD20170524_C01
BELLNIX [ Bellnix ]
