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SCI7661 Datasheet

  • SCI7661

  • DC-DC Converter

  • 9頁

  • EPSON   EPSON

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PF110-10
SCI7661C
OA
/M
OA
ge
lta
Vo n
w ratio s
Lo pe ct
O rodu
P
DC-DC Converter
q
95% Typical Power Efficiency
q
Doubled or Tripled Output Voltage
q
Internal Voltage Regulator
s
DESCRIPTION
The SCI7661C
OA
/M
OA
CMOS DC-DC Converter features high operational performance with low power dissipation.
It consists of two major parts: the booster circuitry and the regulator circuitry. The booster generates a doubled
output voltage (鈥?.4 to 鈥?2V) or tripled output voltage (鈥?.6 to 鈥?8V) from the input (鈥?.2 to 鈥?V). The regulator is
capable of setting the output to any desired voltage. The regulated voltage can be given one of the three threshold
temperature gradients.
s
FEATURES
q
High performance with low power dissipation
q
Simple conversion of V
IN
(鈥?V) to |V
IN
| (+5V),
2 |V
IN
| (+10V), 2V
IN
(鈥?0V) or 3V
IN
(鈥?5V)
q
On-chip output voltage regulator
q
Power conversion efficiency鈥揟yp. 95%
q
Temperature gradient for LCD power supply 鈥?0.1% /
擄C,
0.4%/擄C or 0.6%/
擄C
q
Power off by external signals 鈥?Stationary current at power off 鈥?Max. 2
碌A(chǔ)
q
Cascade connection鈥搕wo device connected:
V
IN
=鈥?V, V
OUT
=鈥?0V
q
On-chip C'鈥揜 oscillator
q
Package .................................... SCI7661C
0A
: DIP-14pin (plastic)
SCI7661M
0A
: SOP5-14pin (plastic)
SCI7661M
AA
: SSOP2-16pin (plastic)
s
BLOCK DIAGRAM
V
DD
CR
Oscillator
Temperature Gradient
Select Circuit
OSC1
OSC2
V
IN
CAP1鈥?/div>
CAP1+
CAP2鈥?/div>
CAP2+
Reference Voltage
Generator
Voltage Regulator
TC1
TC2
T
Voltage
Converter
(I)
Voltage
Converter
(II)
P
off
RV
V
reg
V
out
Booster
Regurator

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