|
|
Part: MC33364D1
Category:
Power Management
-> AC-DC Controllers/Converters
-> AC-DC Switching
-> Off-Line Controllers
Description: Variable-frequency Critical-mode Voltage-mode Flyback Controller With 700V Maximum Startup And Adjustable Frequency Clamp, Package: SO-16, Pins=16
Company: ON Semiconductor
Datasheet: Download MC33364D1 datasheet File size : 39 kB
Request For quote: Find where to buy MC33364D1
Datasheet text preview:
MC33364 Critical Conduction GreenLineTM SMPS Controller
The MC33364 series are variable frequency SMPS controllers that operate in the critical conduction mode. They are optimized for high density power supplies requiring minimum board area, reduced component count, and low power dissipation. Integration of the high voltage startup saves approximately 0.7 W of power compared to the value of the resistor bootstrapped circuits. Each MC33364 features an on- board reference, UVLO function, a watchdog timer to initiate output switching, a zero current detector to ensure critical conduction operation, a current sensing comparator, leading edge blanking, a CMOS driver and cycle- by- cycle current limiting. The MC33364D1 has an internal 126 kHz frequency clamp. The MC33364D2 is available without an internal frequency clamp. The MC33364D has an internal 126 kHz frequency clamp which is pinned out, so that the designer can adjust the clamp frequency by connecting appropriate values of resistance.
General Features http://onsemi.com MARKING DIAGRAMS
8 8 1 SO-8 D1, D2 SUFFIX CASE 751 1 16 16 1 SO-16 D SUFFIX CASE 751K 1 x = 1 or 2 A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week MC33364D AWLYWW M64Dx ALYW
· · · · · · ·
Lossless Off-Line Startup Leading Edge Blanking for Noise Immunity Watchdog Timer to Initiate Switching Operating Temperature Range -25° to +125°C Shutdown Capability Over Temperature Protection Optional/Adjustable Frequency Clamp to Limit EMI
ORDERING INFORMATION
Device MC33364D1 MC33364D1R2 MC33364D2 MC33364D2R2 MC33364D MC33364DR2 Package SO-8 SO-8 Tape & Reel SO-8 SO-8 Tape & Reel SO-16 SO-16 Tape & Reel Shipping 98 Units / Rail 2500 Units / Tape & Reel 98 Units / Rail 2500 Units / Tape & Reel 48 Units / Rail 2500 Units / Tape & Reel
PIN CONNECTIONS
MC33364D1 MC33364D2 Zero Current Current Sense Voltage FB Vref 1 2 3 4 (Top View) MC33364D Zero Current N/C Current Sense Voltage FB N/C Vref N/C Freq Clamp 1 2 3 4 5 6 7 8 (Top View) 13 N/C 12 Vcc 11 Gate Drive 10 P GND 9 A GND 16 Line 8 Line 7 VCC 6 Gate Drive 5 GND
© Semiconductor Components Industries, LLC, 2003
1
May, 2003 - Rev. 13
Publication Order Number: MC33364/D
MC33364
Vref Vcc Line Startup Vref + turn on UVLO + 15V/ 7.6V UVLO Thermal Shutdown 45k FB 15k Watchdog Timer Vcc R + 0.1V FC Frequency Clamp R S Q Level SNA Gate P Gnd A Gnd + Reset 15V/ var Vcc
Vref regulator turn on UVLO
15V/ 8.1V ZCD Vref 10V 5k 1.2V/ 1.0V +
CS
LEB
Figure 1. Representative Block Diagram
Input AC Voltage
Output Voltage
MC33364D ZCD Line CS FB Rsense Vref FC
Vcc Drive P Gnd A Gnd
R1
R2
Figure 2. Typical Application Circuit
http://onsemi.com
2
MC33364
Startup circuit is charging the VCC capacitor 15V Supply Voltage, VCC Startup circuit turns off when VCC is 15V
8.1V VT (3.5 to 6V) 5V Startup circuit turns on when VCC reaches the threshold VT Reference Voltage, Vref
0V Vref regulator turns on when VCC reaches 15V Vref regulator turns off when VCC falls below 8.1 V Vref falls faster than VCC since Vref capacitor is much smaller than VCC capacitor
Maximum drain current is limited to 1.15V / Rsense
Drain Current 0A Switching starts when Vref reaches 5V Switching stops when Vref falls below 3.7V
Figure 3. Timing Diagram in Fault Condition
Criticial Mode Output Current Maximum drain current is limited to 1.15V/ Rsense Drain Current LEB Discontinous Conduction Mode No load
toff(min) Secondary Side Diode Current
Vin Drain Voltage
10V Voltage at ZCD 0.7V ZCD is ignored during minimum off-time limit
Figure 4. Timing Diagram in Normal Condition http://onsemi.com
3
Others parts begin by mc
|
|
|
