- 您现在的位置：买卖IC网 > PDF目录15165 > ISL6307BCRZ-T (Intersil)IC REG CTRLR BUCK PWM VM 48-QFN PDF资料下载
参数资料
| 型号： | ISL6307BCRZ-T |
| 厂商： | Intersil |
| 文件页数： | 30/33页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 48-QFN |
| 标准包装： | 4,000 |
| PWM 型： | 电压模式 |
| 输出数： | 6 |
| 频率 - 最大： | 275kHz |
| 占空比： | 66.7% |
| 电源电压： | 4.75 V ~ 5.25 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： | 48-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页当前第30页第31页第32页第33页
ISL6307B
voltage drop across the ESR increases linearly until the load
current reaches its final value. The capacitors selected must
have sufficiently low ESL and ESR so that the total output-
voltage deviation is less than the allowable maximum.
Neglecting the contribution of inductor current and regulator
response, the output voltage initially deviates by an amount
Input Supply Voltage
The VCC input of SL6307B needs to be connected to +12V
through a 300 ? resistor with one 1μF cap be connected from
VCC to GND.
Switching Frequency
There are a number of variables to consider when choosing
? V ≈ ( ESL ) ----- + ( ESR ) ? I
di
dt
(EQ. 36)
the switching frequency, as there are considerable effects on
the upper-MOSFET loss calculation. These effects are
outlined in MOSFETs , and they establish the upper limit for
The filter capacitor must have sufficiently low ESL and ESR
so that ? V < ? V MAX .
Most capacitor solutions rely on a mixture of high-frequency
capacitors with relatively low capacitance in combination
with bulk capacitors having high capacitance but limited
high-frequency performance. Minimizing the ESL of the
high-frequency capacitors allows them to support the output
voltage as the current increases. Minimizing the ESR of the
bulk capacitors allows them to supply the increased current
with less output voltage deviation.
the switching frequency. The lower limit is established by the
requirement for fast transient response and small output-
voltage ripple as outlined in Output Filter Design . Choose the
lowest switching frequency that allows the regulator to meet
the transient-response requirements.
Switching frequency is determined by the selection of the
frequency-setting resistor, R T (see the figures labeled
Typical Application on pages 4, 5, 6 and 7). Equation 40 is
provided to assist in selecting the correct value for R T .
2.5X10
F SW
The ESR of the bulk capacitors also creates the majority of
the output-voltage ripple. As the bulk capacitors sink and
10
R T = --------------------------
(EQ. 40)
– N V OUT ? V OUT
? V
? IN ?
L ≥ ( ESR ) ------------------------------------------------------------
source the inductor ac ripple current (see Interleaving and
Equation 2), a voltage develops across the bulk-capacitor
ESR equal to I C,P-P (ESR). Thus, once the output capacitors
are selected, the maximum allowable ripple voltage,
V P-P(MAX) , determines the lower limit on the inductance.
(EQ. 37)
f S V IN V P-P ( MAX )
Since the capacitors are supplying a decreasing portion of
the load current while the regulator recovers from the
transient, the capacitor voltage becomes slightly depleted.
The output inductors must be capable of assuming the entire
load current before the output voltage decreases more than
? V MAX . This places an upper limit on inductance.
Equation 38 gives the upper limit on L for the cases when
the trailing edge of the current transient causes a greater
output-voltage deviation than the leading edge. Equation 39
addresses the leading edge. Normally, the trailing edge
dictates the selection of L because duty cycles are usually
less than 50%. Nevertheless, both inequalities should be
Input Capacitor Selection
The input capacitors are responsible for sourcing the AC
component of the input current flowing into the upper
MOSFETs. Their RMS current capacity must be sufficient to
handle the AC component of the current drawn by the upper
MOSFETs that is related to duty cycle and the number of
active phases.
0.3
0.2
0.1
I L,P-P = 0
I L,P-P = 0.5 I O
I L,P-P = 0.75 I O
evaluated, and L should be selected based on the lower of
the two results. In each equation, L is the per-channel
inductance, C is the total output capacitance, and N is the
0
0
0.2
0.4 0.6
DUTY CYCLE (V O /V IN )
0.8
1.0
L ≤ --------------------- ? V MAX – ? I ( ESR )
L ≤ -------------------------- ? V MAX – ? I ( ESR ) ? V IN – V O ?
( ? I ) 2
number of active channels.
2NCV O
( ? I ) 2
( 1.25 ) NC
30
? ?
(EQ. 38)
(EQ. 39)
FIGURE 22. NORMALIZED INPUT-CAPACITOR RMS CURRENT
vs DUTY CYCLE FOR 2-PHASE CONVERTER
FN9225.0
March 9, 2006
相关PDF资料 |
PDF描述 |
|---|---|
| CAT1021ZI-42-GT3 | IC SUPERVISOR CPU 2K EEPR 8MSOP |
| ISL6307IRZ-T | IC REG CTRLR BUCK PWM VM 48-QFN |
| VE-24H-EW-F1 | CONVERTER MOD DC/DC 52V 100W |
| ECM25DTAN-S189 | CONN EDGECARD 50POS R/A .156 SLD |
| GSC22DRTN-S13 | CONN EDGECARD 44POS .100 EXTEND |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6307BIRZ | 功能描述:软开关 PWM 控制器 W/ANNEAL 6-PHS VR11 CNTRLR INDUSTRIAL RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6307BIRZ-T | 功能描述:软开关 PWM 控制器 W/ANNEAL 6-PHS VR11 CNTRLR INDUSTRIAL RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6307CRZ | 功能描述:IC REG CTRLR BUCK PWM VM 48-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) |
| ISL6307CRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 48-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) |
| ISL6307IRZ | 功能描述:IC REG CTRLR BUCK PWM VM 48-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) |
发布紧急采购，3分钟左右您将得到回复。