データシートサーチシステム |
|
UC1842 データシート(PDF) 1 Page - Texas Instruments |
|
UC1842 データシート(HTML) 1 Page - Texas Instruments |
1 / 56 page VIN UC2843 VCC VREF RT/CT GROUND COMP VFB ISENSE OUTPUT Copyright © 2016, Texas Instruments Incorporated Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. UC1842, UC2842, UC3842, UC1843, UC2843, UC3843 UC1844, UC2844, UC3844, UC1845, UC2845, UC3845 SLUS223D – APRIL 1997 – REVISED AUGUST 2016 UCx84x Current-Mode PWM Controllers 1 Features 1 1 • Optimized for Off-Line and DC-to-DC Converters • Low Start-Up Current (< 1 mA) • Automatic Feedforward Compensation • Pulse-by-Pulse Current Limiting • Enhanced Load-Response Characteristics • Undervoltage Lockout With Hysteresis • Double-Pulse Suppression • High-Current Totem-Pole Output • Internally Trimmed Bandgap Reference • Up to 500-kHz Operation • Error Amplifier With Low Output Resistance 2 Applications • Switching Regulators of Any Polarity • Transformer-Coupled DC-DC Converters 3 Description The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state. The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C. Device Information(1) PART NUMBER PACKAGE (PIN) BODY SIZE (NOM) UC184x CDIP (8) 9.60 mm × 6.67 mm LCCC (20) 8.89 mm × 8.89 mm CFP (8) 9.21 mm × 5.97 mm UC284x SOIC (8) 4.90 mm × 3.91 mm SOIC (14) 8.65 mm × 3.91 mm PDIP (8) 9.81 mm × 6.35 mm UC384x SOIC (8) 4.90 mm × 3.91 mm SOIC (14) 8.65 mm × 3.91 mm PDIP (8) 9.81 mm × 6.35 mm CFP (8) 9.21 mm × 5.97 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Application |
同様の部品番号 - UC1842_16 |
|
同様の説明 - UC1842_16 |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |