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| • Trimmed Oscillator for Precise Frequency Control |
| • Oscillator Frequency Guaranteed at 250 kHz |
| • Current Mode Operation to 500 kHz |
| • Automatic Feed Forward Compensation |
| • Latching PWM for Cycle−By−Cycle Current Limiting |
| • Internally Trimmed Reference with Undervoltage Lockout |
| • High Current Totem Pole Output |
| • Undervoltage Lockout with Hysteresis |
| • Low Startup and Operating Current |
| • This is a Pb−Free and Halide−Free Device |
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| CATALOG |
| UC3843BVD1R2G COUNTRY OF ORIGIN |
| UC3843BVD1R2G PARAMETRIC INFO |
| UC3843BVD1R2G PACKAGE INFO |
| UC3843BVD1R2G MANUFACTURING INFO |
| UC3843BVD1R2G PACKAGING INFO |
| UC3843BVD1R2G ECAD MODELS |
| UC3843BVD1R2G FUNCTIONAL BLOCK DIAGRAM
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| COUNTRY OF ORIGIN |
| Philippines |
| Thailand |
| Indonesia |
| China |
|
| PARAMETRIC INFO |
| Control Method |
Current |
| Topology |
Boost|Flyback |
| Number of PWM Outputs |
1 |
| Maximum Duty Cycle (%) |
96(Typ) |
| Switching Frequency (kHz) |
500 |
| Output Current (mA) |
1000(Max) |
| Minimum Operating Temperature (°C) |
-40 |
| Maximum Operating Temperature (°C) |
105 |
| Rise Time (ns) |
50 |
| On/Off Pin |
No |
| Adjustable Output |
No |
| Synchronous Pin |
No |
| Fall Time (ns) |
50 |
| Operating Supply Voltage (V) |
30(Max) |
| Maximum Supply Current (mA) |
12(Typ) |
| Maximum Operating Supply Voltage (V) |
30 |
| Maximum Power Dissipation (mW) |
702 |
| Oscillator Accuracy (kHz) |
250 |
| Minimum Storage Temperature (°C) |
-65 |
| Maximum Storage Temperature (°C) |
150 |
| Type |
Current Mode PWM Controller |
|
| |
| PACKAGE INFO |
| Supplier Package |
SOIC N |
| Basic Package Type |
Lead-Frame SMT |
| Pin Count |
8 |
| Lead Shape |
Gull-wing |
| PCB |
8 |
| Tab |
N/R |
| Pin Pitch (mm) |
1.27 |
| Package Length (mm) |
5(Max) |
| Package Width (mm) |
4(Max) |
| Package Height (mm) |
1.5(Max) |
| Package Diameter (mm) |
N/R |
| Package Overall Length (mm) |
5(Max) |
| Package Overall Width (mm) |
6.2(Max) |
| Package Overall Height (mm) |
1.75(Max) |
| Seated Plane Height (mm) |
1.75(Max) |
| Mounting |
Surface Mount |
| Package Weight (g) |
N/A |
| Package Material |
Plastic |
| Package Description |
Small Outline IC Narrow Body |
| Package Family Name |
SO |
| Jedec |
MS-012AA |
| Package Outline |
Link to Datasheet |
|
| |
| MANUFACTURING INFO |
| MSL |
1 |
| Maximum Reflow Temperature (°C) |
260 |
| Reflow Solder Time (Sec) |
30 |
| Number of Reflow Cycle |
3 |
| Standard |
N/A |
| Reflow Temp. Source |
Link to Datasheet |
| Maximum Wave Temperature (°C) |
260 |
| Wave Solder Time (Sec) |
5 to 6 |
| Lead Finish(Plating) |
Matte Sn annealed |
| Under Plating Material |
N/A |
| Terminal Base Material |
Cu Alloy |
| Number of Wave Cycles |
N/A |
|
| |
| PACKAGING INFO |
| Packaging Suffix |
R2 |
| Packaging |
Tape and Reel |
| Quantity Of Packaging |
2500 |
| Packaging Document |
Link to Datasheet |
|
| |
| ECAD MODELS |
 |
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| FUNCTIONAL BLOCK DIAGRAM |
 |
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