FSDH321 Power Switch Datasheet

FSDH321 Datasheet, PDF, Equivalent


Part Number

FSDH321

Description

Green Mode Power Switch

Manufacture

ON Semiconductor

Total Page 16 Pages
Datasheet
Download FSDH321 Datasheet


FSDH321
Green Mode Power Switch
FSDH321, FSDL321
Description
Each product in the FSDx321 (x for H, L) family consists of an
integrated Pulse Width Modulator (PWM) and SENSEFET, and is
specifically designed for high performance offline Switch Mode
Power Supplies (SMPS) with minimal external components. Both
devices are integrated high voltage power switching regulators which
combine an avalanche rugged SENSEFET® with a current mode
PWM control block. The integrated PWM controller features include:
a fixed oscillator with frequency modulation for reduced EMI, Under
Voltage Lock Out (UVLO) protection, Leading Edge Blanking (LEB),
an optimized gate turn−on/turn−off driver, Thermal Shut Down (TSD)
protection, Abnormal Over Current Protection (AOCP) and
temperature compensated precision current sources for loop
compensation and fault protection circuitry. When compared to a
discrete MOSFET and controller or RCC switching converter
solution, the FSDx321 devices reduce total component count, design
size, weight while increasing efficiency, productivity and system
reliability. Both devices provide a basic platform that is well suited for
the design of cost−effective flyback converters.
Features
Internal Avalanche Rugged SENSEFET
Consumes only 0.65 W at 240 VAC & 0.3 W Load with Advanced
Burst−Mode Operation
Frequency Modulation for EMI Reduction
Precision Fixed Operating Frequency
Internal Start−up Circuit
Pulse−by−Pulse Current Limiting
Abnormal Over Current Protection (AOCP)
Over Voltage Protection (OVP)
Over Load Protection (OLP)
Internal Thermal Shutdown Function (TSD)
Auto−Restart Mode
Under Voltage Lockout (UVLO)
Low Operating Current (max. 3 mA)
Adjustable Peak Current Limit
Built−in Soft Start
Applications
SMPS for STB, Low Cost DVD Player
Auxiliary Power for PC
Adapter & Charger
www.onsemi.com
PDIP8
(9.42x6.38, 2.54P)
CASE 646CM
PIN CONFIGURATION
8DIP
(Top View)
MARKING DIAGRAM
ON ZXYKK
Dx321
Z
XY
KK
Dx321 (x=H/L)
= Assembly Code
= 2−digit Code (Year & Week)
= 2−digit Die−Run Code
= Specific Device Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
© Semiconductor Components Industries, LLC, 2019
December, 2019 − Rev. 0
1
Publication Order Number:
FSDH321/D

FSDH321
ORDERING INFORMATION
Product Number
Package
FSDH321
8DIP
FSDL321
8DIP
FSDH321, FSDL321
Marking Code
DH321
DL321
BVDSS
650 V
650 V
fOSC
100 KHz
50 KHz
RDS(ON)
14 W
14 W
Shipping
3000 / Tube
3000 / Tube
Table 1. OUTPUT POWER TABLE
230VAC+15%
(Note 3)
Product
Adapter
(Note 1)
Open
Frame
(Note 2)
FSDL321
11 W
17 W
FSDH321
11 W
17 W
85−265VAC
Open
Adapter Frame
(Note 1) (Note 2)
8 W 12 W
8 W 12 W
1. Typical continuous power in a non−ventilated enclosed adapter
with sufficient drain pattern as a heat sinker, at 50°C ambient.
2. Maximum practical continuous power in an open frame design
with sufficient drain pattern as a heat sinker, at 50°C ambient.
3. 230 VAC or 100/115 VAC with doubler.
AC
IN
+
Vstr Drain
Ipk
PWM
Vfb Vcc Source
+
+ DC
OUT
Figure 1. Typical Flyback Application
Vcc Vstr
25
Vfb
3
Ipk
4
VBURH
VBURL/VBURH
Vcc
IDELAY
+
+
Vcc
IFB
Soft
Start
2.5R
R
Normal
8 V/12 V
Vcc
+
IBUR(pk)
Vcc good
Freq.
Modulation
Burst
OSC
+ PWM
+
S
R
ICH
Vref
Q
Q
LEB
VSD
+
Internal
Bias
Gate
Driver
Vcc
Vovp
TSD
+
Vcc good
SQ
RQ
AOCP
+
Vocp
Drain
6,7,8
1 GND
Figure 2. Functional Block Diagram of FSDx321
www.onsemi.com
2


Features Green Mode Power Switch FSDH321, FSDL32 1 Description Each product in the FSDx3 21 (x for H, L) family consists of an i ntegrated Pulse Width Modulator (PWM) a nd SENSEFET, and is specifically design ed for high performance offline Switch Mode Power Supplies (SMPS) with minimal external components. Both devices are integrated high voltage power switching regulators which combine an avalanche rugged SENSEFET® with a current mode P WM control block. The integrated PWM co ntroller features include: a fixed osci llator with frequency modulation for re duced EMI, Under Voltage Lock Out (UVLO ) protection, Leading Edge Blanking (LE B), an optimized gate turn−on/turn− off driver, Thermal Shut Down (TSD) pro tection, Abnormal Over Current Protecti on (AOCP) and temperature compensated p recision current sources for loop compe nsation and fault protection circuitry. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSDx321 devices reduce total component count, design s.
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