产品应用与封装尺寸
图纸取自原厂规格书，点击可放大查看原始尺寸标注。
引脚定义与内部结构
| 引脚 | 符号 | 名称 |
|---|---|---|
| 7 | V | |
| 8 | D1 | |
| 9 | GND | |
| 10 | V | |
| 11 | V | |
| 12 | V | |
| 13 | NC | |
| 14 | V | |
| 15 | V | |
| 16 | V |
数据来源：原厂规格书引脚图
产品特点 Features
- control, a temperature compensated amplifier, current sensing comparator, and output ideally suited for driving a power
- N SUFFIX high gain error
- CASE 626 a high current totem pole 8 reference undervoltage lockouts each with current limiting, programmable output pulse metering.
- These devices are available in an mount (SOIC−8) plastic package as well mount (SOIC−14). The SOIC−14 ground pins for the totem pole output
- The UCX842B has UVLO thresholds of ideally suited for off−line converters. The cycle−by−cycle
- SOIC−14 and a latch for single
- D SUFFIX
- CASE 751A dual−in−line and surface 1 the 14−pin plastic surface has separate power and
- SOIC−8
- 8 D1 SUFFIX
- 16 V (on) and 10 V (off),
- CASE 751
- UCX843B is tailored for 1
- Trimmed Oscillator for Precise
- Oscillator Frequency Guaranteed at 250
- Current Mode Operation to 500 kHz
绝对最大额定值 Absolute Maximum Ratings（TA = 25°C）
超过下表数值可能造成器件永久损坏，设计时请留余量。
| 额定值 | 符号 | 值 | 单位 |
|---|---|---|---|
| Output Current, Source or Sink | I | 1.0 | A |
| Output Energy (Capacitive Load per Cycle) | W | 5.0 | kΩJ |
| Error Amp Output Sink Current | I | 10 | mA |
| D Suffix, Plastic Package, SOIC−14 Case 751A | |||
| Maximum Power Dissipation @ T = 25°C | P | 862 | mW |
| Thermal Resistance, Junction−to−Air | RµJA | 145 | °C/W |
| D1 Suffix, Plastic Package, SOIC−8 Case 751 | |||
| Maximum Power Dissipation @ T = 25°C | P | 702 | mW |
| Thermal Resistance, Junction−to−Air | RµJA | 178 | °C/W |
| N Suffix, Plastic Package, Case 626 | |||
| Maximum Power Dissipation @ T = 25°C | P | 1.25 | W |
| Thermal Resistance, Junction−to−Air | RµJA | 100 | °C/W |
| Operating Junction Temperature | T | +150 | °C |
| Operating Ambient Temperature | T | °C | |
| UC3842B, UC3843B | 0 to 70 | ||
| UC2842B, UC2843B | − 25 to + 85 | ||
| UC3842BV, | UC3843BV | −40 to +105 | |
| NCV3843BV | −40 to +125 | ||
| Storage Temperature Range | T | − 65 to +150 | °C |
数据来源：原厂规格书
订货信息与供货形式
| 器件 | Operating | Temperature | Range | 封装 | Shipping† |
|---|---|---|---|---|---|
| UC2842BD | SOIC−14 | 55 Units/Rail | |||
| UC2842BDG | SOIC−14 | 55 Units/Rail | |||
| UC2842BD1 | SOIC−8 | 98 Units/Rail | |||
| UC2842BD1G | SOIC−8 | 98 Units/Rail | |||
| UC2842BD1R2 | SOIC−8 | 2500 Tape & Reel | |||
| UC2842BD1R2G | SOIC−8 | 2500 Tape & Reel | |||
| UC2842BN | PDIP−8 | ||||
| UC2842BNG | PDIP−8 | ||||
| UC3842BN | PDIP−8 | ||||
| UC3842BNG | PDIP−8 | ||||
| UC3842BD | SOIC−14 | 55 Units/Rail | |||
| UC3842BDG | SOIC−14 | 55 Units/Rail | |||
| UC3842BDR2 | SOIC−14 | 2500 Tape & Reel | |||
| UC3842BDR2G | T A = | 0° to +70°C | SOIC−14 | 2500 Tape & Reel | |
| UC3842BD1 | SOIC−8 | 98 Units/Rail | |||
| UC3842BD1G | SOIC−8 | 98 Units/Rail | |||
| UC3842BD1R2 | SOIC−8 | ||||
| UC3842BD1R2G | SOIC−8 | ||||
| UC3842BVDR2 | SOIC−14 | ||||
| UC3842BVDR2G | SOIC−14 | ||||
| UC3842BVD1 | SOIC−8 | 98 Units/Rail | |||
| UC3842BVD1G | T A = | −40° to +105°C | SOIC−8 | 98 Units/Rail | |
| UC3842BVD1R2 | SOIC−8 | 2500 Tape & Reel | |||
| UC3842BVD1R2G | SOIC−8 | 2500 Tape & Reel | |||
| UC2843BD | SOIC−14 | 55 Units/Rail | |||
| UC2843BDG | SOIC−14 | 55 Units/Rail | |||
| UC2843BDR2 | SOIC−14 | 2500 Tape & Reel | |||
| UC2843BDR2G | T A = | −25° to +85°C | SOIC−14 | 2500 Tape & Reel | |
| UC2843BD1 | SOIC−8 | 98 Units/Rail | |||
| UC2843BD1G | SOIC−8 | 98 Units/Rail | |||
| UC2843BD1R2 | SOIC−8 | 2500 Tape & Reel | |||
| UC2843BD1R2G | SOIC−8 | 2500 Tape & Reel | |||
| UC2843BN | PDIP−8 | 1000 Units/Rail | |||
| UC2843BNG | PDIP−8 | 1000 Units/Rail | |||
| UC3843BD | SOIC−14 | 55 Units/Rail | |||
| UC3843BDG | SOIC−14 | 55 Units/Rail | |||
| UC3843BDR2 | SOIC−14 | 2500 Tape & Reel | |||
| UC3843BDR2G | SOIC−14 | 2500 Tape & Reel | |||
| UC3843BD1 | SOIC−8 | 98 Units/Rail | |||
| UC3843BD1G | SOIC−8 | 98 Units/Rail | |||
| UC3843BD1R2 | SOIC−8 | ||||
| UC3843BD1R2G | SOIC−8 | ||||
| UC3843BDR2 | SOIC−14 | ||||
| UC3843BDR2G | SOIC−14 | ||||
| UC3843BN | PDIP−8 | 1000 Units/Rail | |||
| UC3843BNG | PDIP−8 | 1000 Units/Rail | |||
| UC3843BVD | SOIC−14 | 55 Units/Rail | |||
| UC3843BVDG | SOIC−14 | 55 Units/Rail | |||
| UC3843BVDR2 | SOIC−14 | 2500 Tape & Reel | |||
| UC3843BVDR2G | SOIC−14 | 2500 Tape & Reel | |||
| UC3843BVD1 | SOIC−8 | 98 Units/Rail | |||
| UC3843BVD1G | T A = | −40° to +105°C | SOIC−8 | 98 Units/Rail | |
| UC3843BVD1R2 | SOIC−8 | 2500 Tape & Reel | |||
| UC3843BVD1R2G | SOIC−8 | 2500 Tape & Reel | |||
| UC3843BVN | PDIP−8 | 1000 Units/Rail | |||
| UC3843BVNG | PDIP−8 | 1000 Units/Rail | |||
| NCV3843BVDR2 | SOIC−14 | 2500 Tape & Reel | |||
| NCV3843BVDR2G | T A = | −40° to +125°C | SOIC−14 | 2500 Tape & Reel |