UC2842B: High Performance Current Mode PWM Controller
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering. These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage. The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
技术特性
- 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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封装图 PACKAGE DIMENSIONS
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订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| UC2842BD1G |
Active |
|
High Performance Current Mode PWM Controller |
SOIC-8 |
751-07 |
1 |
Tube |
98 |
$0.48 |
| UC2842BD1R2G |
Active |
|
High Performance Current Mode PWM Controller |
SOIC-8 |
751-07 |
1 |
Tape and Reel |
2500 |
$0.48 |
| UC2842BDG |
Active |
|
High Performance Current Mode PWM Controller |
SOIC-14 |
751A-03 |
1 |
Tube |
55 |
$0.48 |
| UC2842BDR2G |
Active |
|
High Performance Current Mode PWM Controller |
SOIC-14 |
751A-03 |
1 |
Tape and Reel |
2500 |
$0.48 |
| UC2842BNG |
Active |
|
High Performance Current Mode PWM Controller |
PDIP-8 |
626-05 |
|
Tube |
50 |
$0.48 |
数据资料DataSheet下载
