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Part Number: MC34065-H,L
Description: The MC34065H,L series are high performance, fixed frequency, dual current mode controllers. They are s...
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MC34065-H,L
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DataSheet
General Description
MC34065-H,L General Description
The MC34065H,L series are high performance, fixed frequency, dual current mode controllers. They are specifically designed for offline and dctodc converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature a unique oscillator for precise duty cycle limit and frequency control, a temperature compensated reference, two high gain error amplifiers, two current sensing comparators, Drive Output 2 Enable pin, and two high current totem pole outputs ideally suited for driving power MOSFETs.
Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cyclebycycle current limiting, and a latch for single pulse metering of each output. These devices are available in dualinline and surface mount packages.
The MC34065H has UVLO thresholds of 14 V (on) and 10 V (off), ideally suited for offline converters. The MC34065L is tailored for lower voltage applications having UVLO thresholds of 8.4 V (on) and 7.8 V (off).
MC34065-H,L Maximum Ratings
|
Rating |
Symbol |
Value |
Unit |
| Power Supply Voltage |
VCC |
20 |
V |
| Output Current, Source or Sink (Note 1) |
IO |
400 |
mA |
| Output Energy (Capacitive Load per Cycle) |
W |
5.0 |
J |
| Current Sense, Enable, and Voltage Feedback Inputs |
Vin |
0.3 to +5.5 |
V |
| Sync Input High State (Voltage) Low State (Reverse Current) |
VIH IIL |
+5.5 5.0 |
+5.5 5.0 |
| Error Amp Output Sink Current |
IO |
10 |
mA |
| Power Dissipation and Thermal Characteristics DW Suffix, Plastic Package Case 751G Maximum Power Dissipation @ TA = 25 Thermal Resistance, JunctiontoAir P Suffix, Plastic Package Case 648 Maximum Power Dissipation @ TA = 25 Thermal Resistance, JunctiontoAir |
PD RJA PD RJA |
862 145 1.25 100 |
mW /W mW /W |
| Operating Junction Temperature |
TJ |
+150 |
|
| Operating Ambient Temperature (Note 3) MC34065 MC33065 |
TA |
0 to +70 40 to +85 |
|
| Storage Temperature Range |
Tstg |
65 to +150 |
MC34065-H,L Features
• Unique Oscillator for Precise Duty Cycle Limit and Frequency Control
• Current Mode Operation to 500 kHz
• Automatic Feed Forward Compensation
• Separate Latching PWMs for CycleByCycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• Drive Output 2 Enable Pin
• Two High Current Totem Pole Outputs
• Input Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current
MC34065-H,L Connection Diagram
MC306
PDF/DataSheet Download
- Datasheet: MC306
- File Size: 28737 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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