データシートサーチシステム |
|
CS1601 データシート(PDF) 9 Page - Cirrus Logic |
|
CS1601 データシート(HTML) 9 Page - Cirrus Logic |
9 / 16 page CS1601 DS931PP6 9 5. GENERAL DESCRIPTION The CS1601 offers numerous features, options, and functional capabilities to the electronic product lighting designer. This digital PFC control IC is designed to replace legacy analog PFC controllers with minimal design effort. 5.1 PFC Operation One key feature of the CS1601 is its operating frequency profile. Figure 11 illustrates how the frequency varies over half cycle of the line voltage in steady-state operation. When power is first applied to the CS1601, it examines the line voltage and adapts its operating frequency to the line voltage as shown in Figure 11. The operating frequency is varied from the peak to the trough of the AC input. During startup, the control algorithm generates maximum power while operating in critical conduction mode (CRM), providing an approximate square-wave current envelop within every half-line cycle. Figure 11. Switching Frequency vs. Phase Angle Figure 12 illustrates how the operating frequency of CS1601 (as a percentage of maximum frequency) changes with output power and the peak of the line voltage. Figure 12. CS1601 Max Switching Freq vs. Output Power Figure 13 illustrates how the operating frequency of CS1601H changes with output power and the peak of the line voltage. Figure 13. CS1601H Max Switching Freq vs.Output Power When PO falls below 5%, the CS1601 changes to Burst Mode. (Refer to Burst Mode section for more information.) The CS1601 is designed to function as a DCM controller. However, during peak periods, the controller may interchange control methods and operate in a quasi-critical-conduction mode (quasi-CRM) at low line. For example, at 108VAC main input under full load, the PFC controller will function as a quasi-CRM controller at the peak of the AC line cycle, as shown in Figure 14. Figure 14. DCM and quasi-CRM Operation with CS1601 The zero-current detection (ZCD) of the boost inductor is achieved using an auxiliary winding. When the stored energy of the inductor is fully released to the output, the voltage on the ZCD pin decreases, triggering a new switching cycle. This quasi-resonant switching allows the active switch to be turned on with near-zero inductor current, resulting in a nearly lossless switch event. This minimizes turn-on losses and EMI noise created by the switching cycle. Power factor correction control is achieved during light load by using on-time modulation. 0 20 40 60 80 100 120 045 90 135 180 Rectified Line Voltage Phase (Deg.) Switching Freq. (% of Max.) Line Voltage (% of Max.) % POmax 20 70 60 40 40 5 20 0 60 80 100 48 Vin >156 VAC (Input Voltage 108 – 305 VAC, Vlink = 460V) Vin <182 VAC (Input Voltage 108 –305 VAC , Vlink = 460V) Vin <158 VAC (Input Voltage 90 –264 VAC, Vlink = 400 V) Vin >136 VAC (Input Voltage 90 –264 VAC, Vlink = 400 V) % PO max 100 75 25 0 50 Vin> 156 VAC (Input Voltage 108 –305 VAC , V link = 460V) Vin< 182 VAC (Input Voltage 108 –305 VAC, Vlink = 460 V) Vin< 158 VAC (Input Voltage 90– 264 VAC, Vlink = 400V) Vin >136 VAC (Input Voltage 90 –264 VAC , Vlink = 400V) 20 40 5 60 80 100 DCM Quasi CRM DCM Quasi CRM DCM ILB t [ms] IAC |
同様の部品番号 - CS1601 |
|
同様の説明 - CS1601 |
|
|
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 |