MC34067DW ON Semiconductor, MC34067DW Datasheet - Page 12

• Manufacturer Part Number: MC34067DW
• Description: IC CTRLR SMPS DBL END HF 16SOIC
• Manufacturer: ON Semiconductor
• Type: Flybackr

Specifications of MC34067DW

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Current - Output: 100mA
• Frequency - Switching: 525kHz ~ 2.05MHz
• Voltage - Input: 2.5 ~ 20 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Power - Output: 862mW
• Output Voltage Range: 5 V to 5.2 V
• Input Voltage Range: 20 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MC34067DWOS

inductance, not by the MC34067. The One−Shot in the
MC34067 only assures that the power switch is turned on
under a zero voltage condition. Adjust the one−shot period
The maximum duty cycle is controlled by the leakage
C
One-Shot
Drive Output A
Drive Output B
Input Voltage
Primary Current
Output Rectifier Voltage
OSC
V
in
/Turns Ratio
+ I
- I
1/2 V
primary
primary
5.1 V
3.6 V
5.1 V
3.6 V
0 V
0 A
V
in
in
Figure 21. Application Timing Diagram
http://onsemi.com
12
so that the output switch is activated while the primary
current is slewing but before the current changes polarity.
The resonant stage should then be designed to be as long as
the time for the primary current to go to 0 A.