MN3113F Datasheet, PDF (12/12 Pages) Panasonic Semiconductor – Vertical Driver LSI for Video Camera CCD Area Image Sensor

MN3113F
For Video Equipment
3. Adjusting boost voltages with SENSE pins
The MN3113F provides the SENSE pins, SENSE1 and SENSE2, for adjusting the boost voltages (V_OUT+
and V_OUT– ) with the following procedures.
Adjusting the positive boosted voltage
(1) Making V_OUT+ < 15V
Insert a resistor, R, between the SENSE1 pin (pin 17) and the V_OUT+ pin (pin 16). The theoretical output
voltage at the V_OUT+ pin is then given by the following formula.
50kΩ + 100kΩ//R
V_OUT+' = V_CC x
50kΩ
(where 100 kΩ//R is the effective resistance of
the 100 kΩ resistor and R connected in parallel.)
For example, if R is 50 kΩ,
50kΩ + 33.3kΩ
V_OUT+' = 5 x
50kΩ
= 8.3V
(2) Making V_OUT+ > 15V
Insert a resistor, R, between the SENSE1 pin (pin 17) and the GND pin (pin 42).
50kΩ//R + 100kΩ
V_OUT+' = V_CC x
50kΩ//R
Adjusting the negative boosted voltage
(1) Making V_OUT– < –10V
Insert a resistor, R, between the SENSE2 pin (pin 39) and the GND pin (pin 42).
50kΩ//R + 50kΩ
V_OUT–' = V_CC x
50kΩ//R
(2) Making V_OUT– > –10V
Insert a resistor, R, between the SENSE2 pin (pin 39) and the V_OUT– pin (pin 40).
50kΩ + 50kΩ//R
V_OUT–' = –V_CC x
50kΩ
For example, if R is 50 kΩ,
50kΩ + 25kΩ
V_OUT–' = –5 x
50kΩ
= –7.5V
Note, however, that the above formulas are mere guidelines, that the internal resistances vary between
samples, and that therefore each sample will have to be adjusted.
Note also that booster circuit capacity and output load current impose limits on adjustments for boosting
V_OUT+ above 15V and V_OUT– below –10V.
(The maximum possible adjustments are 20V for V_OUT+ and –15V for V_OUT– .)