参数资料
| 型号： | ISL6540ACRZ-T |
| 厂商： | Intersil |
| 文件页数： | 21/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 28-QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 2MHz |
| 占空比： | 100% |
| 电源电压： | 2.97 V ~ 22 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 28-VFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1243 (CN2011-ZH PDF) |
| 其它名称： | ISL6540ACRZ-TDKR |
ISL6540A
P LOWER = ? I O 2 + -------- ? ? --------------------------- ? ( 1 – D ) + P DEAD
P DEAD = ? I O + ------ I ? ? V DT ? t DT + ? I O – ------ ? ? V DL ? t DL ? F S
P UPPER = ? I O 2 + -------- ? ? ---------------------------- ? D + P SW + P Qrr
P SW = ? I O + ------ I ? ? t OFF + ? I O – ------ ? ? t ON ? VIN ? F S
components; conduction loss and switching loss. The
conduction losses are the largest component of power
dissipation for both the upper and the lower MOSFETs.
These losses are distributed between the two MOSFETs
according to duty factor (see the equations below). The
upper MOSFET exhibits turn-on and turn-off switching
losses as well as the reverse recover loss, while the
synchronous rectifier exhibits body-diode conduction losses
during the leading and trailing edge dead times.
Δ I 2 r DS ( ON ) ,L
? 12 ? N
L
Δ Δ I
? 12 ? ? 12 ?
Δ I 2 r DS ( ON ) ,U
? 12 ? N
U
Δ Δ I
? 12 ? ? 12 ?
where D is the duty cycle = V O /VIN; Q rr is the reverse
recover charge; t DL and t DT are leading and trailing edge
dead time, and t ON and t OFF are the switching intervals.
These equations do not include the gate-charge losses that
are proportional to the total gate charge and the switching
frequency and partially dissipated by the internal gate
resistance of the MOSFETs. Ensure that both MOSFETs are
within their maximum junction temperature at high ambient
temperature by calculating the temperature rise according to
package thermal-resistance specifications. A separate
heatsink may be necessary depending upon MOSFET
power, package type, ambient temperature and air flow.
P Qrr = Q rr ? VIN ? F S
(EQ. 22)
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Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
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21
FN6288.5
October 7, 2008
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相关代理商/技术参数 |
参数描述 |
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| ISL6540ACRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6540ACRZ-T W/GOLD BOND WIRE ONLY - Tape and Reel |
| ISL6540AIRZ | 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6540AIRZA | 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6540AIRZA-T | 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| ISL6540AIRZR5359 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
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