AN8083 Panasonic Semiconductor, AN8083 Datasheet - Page 3

• Manufacturer Part Number: AN8083
• Description: Low Voltage Operation IC for DC-DC Converter
• Manufacturer: Panasonic Semiconductor

ICs for CD/CD-ROM Player
Pin No.
Pin Description
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
POWER
Symbol
START
SPRO
GND
Reset
DED
OUT
PV
CLK
EMP
V
V
V
FB
CT
IN
REF
SEN
CC
CC
• Input pin for error amplifier
• Threshold voltage ; 0.7V
• Output pin for error amplifier
• Short-circuit protection input pin.
• Dead time control input.
• Switching output pin
• GND pin
• Triangular oscillating capacitor pin
• DC voltage input pin
• Clock input
• Start pin
• Power ON/OFF pin
• Reference voltage pin
• Decreased voltage detection output pin
• Decreased voltage detection input pin
• Reset output pin
• DC voltage input pin
T
1
If output of error amplifier does not become “L” when t=CV
switched.
Maximum duty ratio set to 85%.
Output current ; I
Operates with 1.2V or more.
Output ON/OFF switching pin (Output is off at “L.”)
“H” when detected by open collector output form
Operates with 1.8V or more.
· It is used to synchronize triangular oscillation with clock input and operates at rise edge of
· The threshold level is TTL level.
· It is open when not used.
· Starts switching of starter
· Threshold voltage, PV
· 1.25V output
· Charged and discharged current of triangular oscillation is determined by external R.
· Threshold voltage ; 2.15V
· “H” when V
· Open collector output form
clock.
Maximum duty ratio can be changed by installing
external resistance between Pins 12 and 4.
T
2
I (Charged) =
I (Discharged) =1.40 I (Charged)
CC
becomes 4.2V or more
O
=20mA (max.)
V
CC
T
f =
– 0.9V
R
V
1
REF
=
REF
T
I (Discharged)
+1k
1
– 0.7
1
+T
Pin Description
I
V
2
SPRO
CV
th
=0.9V
=25 A
T
2
=
I (Charged)
CV
th
/I
SPRO
I Discharged=52 A
I Charged=30 A
V=0.58V
In normal mode
output of IC is not
AN8083S