Anterwell Technology Ltd.
| Payment Terms | T/T, Western Union, Paypal |
| Supply Ability | 4200pcs |
| Delivery Time | 1 day |
| Packaging Details | please contact me for details |
| Supply Voltage (low impedance source) | 30 V |
| Output Current | ±1 A |
| Output Energy (capacitive load) | 5 µJ |
| Error Amplifier Output Sink Current | 10 mA |
| Storage Temperature Range | – 65 to 150 °C |
| Junction Operating Temperature | – 40 to 150 °C |
| Brand Name | Anterwell |
| Model Number | UC3844AN |
| Certification | new & original |
| Place of Origin | original factory |
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Product Specification
| Payment Terms | T/T, Western Union, Paypal | Supply Ability | 4200pcs |
| Delivery Time | 1 day | Packaging Details | please contact me for details |
| Supply Voltage (low impedance source) | 30 V | Output Current | ±1 A |
| Output Energy (capacitive load) | 5 µJ | Error Amplifier Output Sink Current | 10 mA |
| Storage Temperature Range | – 65 to 150 °C | Junction Operating Temperature | – 40 to 150 °C |
| Brand Name | Anterwell | Model Number | UC3844AN |
| Certification | new & original | Place of Origin | original factory |
| High Light | electronic chip board ，electronic components ic | ||
HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
FEATURES
■ TRIMMED OSCILLATOR DISCHARGE CURRENT
■ CURRENT MODE OPERATION TO 500kHz 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 START-UP CURRENT (< 0.5mA) DOUBLE PULSE SUPPRESSION
Figure 1. Package Table 1. Order Codes
| Part Number | Package |
| UC2842AD1; UC3842AD1; UC2843AD1; UC3843AD1; UC2844AD1; UC3844AD1; UC2845AD1; UC3845AD1 | SO-8 |
| UC2842AN; UC3842AN; UC2843AN; UC3843AN; UC2844AN; UC3844AN; UC2845AN; UC3845AN | DIP-8 |
DESCRIPTION
The UC384xA family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.
Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC3842A and UC3844A have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC3843A and UC3845A are 8.5 V and 7.9V. The UC3842A and UC3843A can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC3844A and UC3845A by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
Figure 2. Block Diagram (toggle flip flop used only in UC3844A and UC3845A)
Table 2. Absolute Maximum Ratings
| Symbol | Parameter | Value | Unit |
| Vi | Supply Voltage (low impedance source) | 30 | V |
| Vi | Supply Voltage (Ii < 30mA) | Self Limiting | |
| IO | Output Current | ±1 | A |
| EO | Output Energy (capacitive load) | 5 | µJ |
| Analog Inputs (pins 2, 3) | – 0.3 to 5.5 | V | |
| Error Amplifier Output Sink Current | 10 | mA | |
| Ptot | Power Dissipation at Tamb ≤ 25 °C (DIP-8) | 1.25 | W |
| Ptot | Power Dissipation at Tamb ≤ 25 °C (SO-8) | 800 | mW |
| Tstg | Storage Temperature Range | – 65 to 150 | °C |
| TJ | Junction Operating Temperature | – 40 to 150 | °C |
| TL | Lead Temperature (soldering 10s) | 300 | °C |
* All voltages are with respect to pin 5, all currents are positive into the specified terminal.
Company Details
Business Type:
Distributor/Wholesaler,Trading Company
Year Established:
2004
Total Annual:
500000-1000000
Employee Number:
20~30
Ecer Certification：
Site Member
King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and ... King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and ...
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