AN8083 Просмотр технического описания (PDF) - Panasonic Corporation
Номер в каталоге
Компоненты Описание
производитель
AN8083 Datasheet PDF : 5 Pages
| |||
ICs for CD/CD-ROM Player
AN8083S
s Pin Description
Pin No. Symbol
1
IN
2
FB
• Input pin for error amplifier
• Threshold voltage ; 0.7V
• Output pin for error amplifier
Pin Description
• Short-circuit protection input pin.
3
SPRO
If output of error amplifier does not become “L” when t=CVth/ISPRO output of IC is not
switched.
ISPRO=25µA
Vth=0.9V
• Dead time control input.
4
DED
Maximum duty ratio set to 85%.
Maximum duty ratio can be changed by installing
external resistance between Pins 12 and 4.
5
OUT
• Switching output pin
Output current ; IO=20mA (max.)
6
GND
• GND pin
• Triangular oscillating capacitor pin
7
CT
T1
T2
T1
=
I
CV
(Discharged)
T2 =
I
CV
(Charged)
V
f=
1
T1+T2
I Discharged=52µA
I Charged=30µA
V=0.58V
In normal mode
8
PVCC
• DC voltage input pin
Operates with 1.2V or more.
• Clock input
· It is used to synchronize triangular oscillation with clock input and operates at rise edge of
9
CLK
clock.
· The threshold level is TTL level.
· It is open when not used.
• Start pin
10
START
· Starts switching of starter
· Threshold voltage, PVCC – 0.9V
11
POWER
• Power ON/OFF pin
Output ON/OFF switching pin (Output is off at “L.”)
• Reference voltage pin
· 1.25V output
12
VREF
· Charged and discharged current of triangular oscillation is determined by external R.
I (Charged) =
VREF – 0.7
RREF+1kΩ
I (Discharged) =1.40 × I (Charged)
13
EMP
• Decreased voltage detection output pin
“H” when detected by open collector output form
14
VSEN
• Decreased voltage detection input pin
· Threshold voltage ; 2.15V
• Reset output pin
15
Reset
· “H” when VCC becomes 4.2V or more
· Open collector output form
16
VCC
• DC voltage input pin
Operates with 1.8V or more.
Share Link: 