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參數(shù)資料
| 型號： | MC44605P |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RW-S Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 05V; Output Voltage (Vdc): 05V; Power: 2W; DIP24 Low Profile Miniature Package; 1kVDC Isolation; Feedback Regulated Output; 2:1 Wide Range Voltage Input; Continuous Short Circuit Protection; Less than 7mm Height; SMD Pinning Option; Efficiency to 87% |
| 中文描述： | 0.75 A SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 328K |
| 代理商： | MC44605P |
Semiconductor Components Industries, LLC, 2000
May, 2000 – Rev. 2
1
Publication Order Number:
MC44605/D
"
! "#
The MC44605 is a high performance current mode controller that is
specifically designed for off–line converters. This circuit has several
distinguishing features that make it particularly suitable for
multisynchronized monitor applications.
The MC44605 synchronization arrangement enables operation from
16 kHz up to 130 kHz. This product was optimized to operate with
universal mains voltage, i.e., from 80 V to 280 V, and its high current
totem pole output makes it ideally suited for driving a power MOSFET.
The MC44605 protections enable a well–controlled and safe power
management. Four major faults while detected, activate the analogic
counter of a disabling block designed to perform a latched circuit
output inhibition.
Current Mode Controller
Current Mode Operation up to 250 kHz Output Switching Frequency
Inherent Feed Forward Compensation
Latching PWM for Cycle–by–Cycle Current Limiting
Oscillator with Precise Frequency Control
Externally Programmable Reference Current
Secondary or Primary Sensing (Availability of Error Amplifier Output)
Synchronization Facility
High Current Totem Pole Output
Vcc Undervoltage Lockout with Hysteresis
Low Output dV/dT for Low EMI Radiations
Low Start–Up and Operating Current
Safety/Protection Features
Soft–Start Feature
Demagnetization (Zero Current Detection) Protection
Overvoltage Protection Facility against Open Loop
EHT Overvoltage Protection (E.H.T.OVP): Detection of too High
Synchronization Pulses
Winding Short Circuit Detection (W.S.C.D.)
Limitation of the Maximum Input Power (M.P.L.): Calculation of
Input Power for Overload Protection
Overheating Detection (O.H.D.): to Prevent the Power Switch from
an Excessive Heating
Latched Disabling Mode
When one of the following faults is detected: EHT overvoltage,
Winding Short Circuit (WSCD), a too high input power (M.P.L.),
power switch overheating (O.H.D.), an analogic counter is activated
If the counter is activated for a time that is long enough, the circuit
gets definitively disabled. The latch can only be reset by making
decrease the Vcc down to about 3 V, i.e., practically by unplugging or
turning off the SMPS.
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
Device
Package
Shipping
ORDERING INFORMATION
MC44605P
PDIP–16
25 Units/Rail
http://onsemi.com
PDIP–16
P SUFFIX
CASE 648
1
16
MARKING
DIAGRAM
A
WL, L
YY, Y
WW, W = Work Week
= Assembly Location
= Wafer Lot
= Year
1
16
MC44605P
AWLYYWW
PIN CONNECTIONS
1
16
13
12
11
10
9
2
3
4
5
6
7
8
(Top View)
VCC
VC
Output
Overheating
Detection
Current Sense Input
Demagnetization
Detection Input
Rref
Sync and
EHTOVP Input
Gnd
Max Power Limtation
Osc Capacitor (CT)
Soft–Start Input
Disabling Block (Cext)
Error Amp Output
15
14
Voltage Feedback Input
WSCD*Program
* Winding Short Circuit Detection
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