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參數資料
| 型號： | UC2879Q |
| 英文描述： | 40MHZ to 1GHZ amplifier |
| 中文描述： | 電流/電壓模式開關電源控制器 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 373K |
| 代理商： | UC2879Q |
6/98
FEATURES
Programmable Output Turn On
Delay; Zero Delay Available
Compatible with Voltage Mode or
Current Mode Topologies
Practical Operation at Switching
Frequencies to 300kHz
Four 100mA Totem Pole Outputs
10MHz Error Amplifier
Pin Programmable Undervoltage
Lockout
Low Startup Current - 150
μ
A
Soft Start Control
Outputs Active Low During UVLO
Phase Shift Resonant Controller
BLOCK DIAGRAM
UDG-94070-1
UC1879
UC2879
UC3879
DESCRIPTION
The UC3879 controls a bridge power stage by phase shifting the switching
of one half-bridge with respect to the other. This allows constant frequency
pulse width modulation in combination with resonant, zero-voltage switching
for high efficiency performance. The UC3879 can be configured to provide
control in either voltage mode or current mode operation, with overcurrent
shutdown for fast fault protection.
Independently programmable time delays provide dead-time at the turn-on
of each output stage, allowing time for each resonant switching interval.
With the oscillator capable of operating in excess of 600kHz, overall output
switching frequencies to 300kHz are practical. In addition to the standard
free running mode, with the CLKSYNC pin, the user may configure the
UC3879 to accept an external clock synchronization signal. Alternatively, up
to three units can be locked together with the operational frequency deter-
mined by the fastest device.
Protective features include an undervoltage lockout and overcurrent protec-
tion. Additional features include a 10MHz error amplifier, a 5V precision ref-
erence, and soft start. The UC3879 is available in 20 pin N, J, DW, and Q
and 28 pin L packages.
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相關PDF資料 |
PDF描述 |
|---|---|
| UC3879DW | Quad 2-input OR gate |
| UC3879N | Octal D-type latch with 3 state outputs (non inverted) |
| UC3879Q | Octal D-type flip-flop with 3 state outputs (non inverted) |
| UC2886J | Bluetooth class 2 module with embedded SPP SW |
| UC1886J | Multifunction quad power amplifier with built-in diagnostics features |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UC2886D | 功能描述:電流型 PWM 控制器 Avg Current Mode IC RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC2886DG4 | 功能描述:電流型 PWM 控制器 Avg Current Mode IC RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC28TRXS | 制造商:ST MICRO 功能描述:New |
| UC2901 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Isolated Feedback Generator |
| UC2901D | 功能描述:反饋回路功率控制器 Isolated Feedback Generator RoHS:否 參考電壓:1.3 V 輸出電流:100 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Texas Instruments |
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