データシートサーチシステム |
|
CS2841BED14 データシート(PDF) 5 Page - Cherry Semiconductor Corporation |
|
CS2841BED14 データシート(HTML) 5 Page - Cherry Semiconductor Corporation |
5 / 6 page 5 former saturation in some power supplies, the internal oscillator waveform provides the maximum duty cycle clamp as programmed by the selection of OSC compo- nents. Setting the Oscillator Oscillator timing capacitor, CT, is charged by VREF through RT and discharged by an internal current source. During the discharge time, the internal clock signal blanks out the output to the Low state, thus providing a user selected maximum duty cycle clamp. Charge and discharge times are determined by the general formulas: tc = RTCT ln td = RTCT ln Substituting in typical values for the parameters in the above formulas: VREF = 5.0V, Vupper = 2.7V, Vlower = 1.0V, Id = 8.3mA tc ≈ 0.5534RTCT td = RTCT ln The frequency and maximum duty cycle can be deter- mined from the Typical Performance Characteristic graphs. Grounding High peak currents associated with capacitive loads neces- sitate careful grounding techniques. Timing and bypass capacitors should be connected close to Gnd pin in a sin- gle point ground. The transistor and 5kΩ potentiometer are used to sample the oscillator waveform and apply an adjustable ramp to Sense. ) 2.3 - 0.0083 RT 4.0 - 0.0083 RT ( ) VREF - IdRT - Vlower VREF - IdRT - Vupper ( ) VREF - Vlower VREF - Vupper ( VREF OSC Gnd RT CT Circuit Description: continued VOSC Internal Clock LARGE RT (≈10kΩ) VOSC Internal Clock SMALL RT (≈700kΩ) Sawtooth Mode Triangular Mode Vupper Vlower tc td VCC IO VO Switch Current EA Output OSC OSC RESET Figure 2: Timing Diagram for key CS2841B parameters Figure 3: Oscillator Timing Network and parameters Timing parameters |
同様の部品番号 - CS2841BED14 |
|
同様の説明 - CS2841BED14 |
|
|
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 |