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參數(shù)資料
| 型號(hào)： | ISL6219 |
| 廠(chǎng)商： | Intersil Corporation |
| 英文描述： | Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-TSSOP -40 to 85 |
| 中文描述： | 微處理器核心電壓調(diào)節(jié)精度多相降壓PWM控制器，用于移動(dòng)應(yīng)用 |
| 文件頁(yè)數(shù)： | 16/17頁(yè) |
| 文件大?。?/td> | 476K |
| 代理商： | ISL6219 |
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16
page 3). Figure 13 and Equation 23 are provided to assist in
the selecting the correct value for RT.
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 which is related to duty cycle and the number of
active phases.
Figures 14 and 15 can be used to determine the input-
capacitor rms current as of duty cycle, maximum sustained
output current (I
O
), and the ratio of the combined peak-to-
peak inductor current (I
L,PP
) to I
O
. Figure 16 is provided as a
reference to demonstrate the dramatic reductions in input-
capacitor rms current upon the implementation of the
multiphase topology.
RT
10
11.09
1.13
f
S
(
)
log
–
[
]
=
(EQ. 23)
FIGURE 13. RT VS SWITCHING FREQUENCY
100
1000
10000
10
SWITCHING FREQUENCY (KHZ)
10
100
1000
R
)
0.3
0.1
0
0.2
I
R
/
O
)
FIGURE 14. NORMALIZED INPUT-CAPACITOR RMS
CURRENT VS DUTY CYCLE FOR 2-PHASE
0
0.4
1.0
0.2
0.6
0.8
DUTY CYCLE (V
O
/V
IN
)
I
PP
= 0
I
PP
= 0.5 I
O
I
PP
= 0.75 I
O
DUTY CYCLE (V
IN
/ V
O
)
FIGURE 15. NORMALIZED INPUT-CAPACITOR RMS
CURRENT VS DUTY CYCLE FOR 3-PHASE
0
0.4
1.0
0.2
0.6
0.8
I
R
/
O
)
0.3
0.1
0
0.2
I
PP
= 0
I
PP
= 0.25 I
O
I
PP
= 0.5 I
O
I
PP
= 0.75 I
O
FIGURE 16. NORMALIZED INPUT-CAPACITOR RMS
CURRENT VS DUTY CYCLE FOR SINGLE-PHASE
CONVERTER
0
0.4
1.0
0.2
0.6
0.8
DUTY CYCLE (V
IN
/ V
O
)
I
R
/
O
)
0.6
0.2
0
0.4
I
PP
= 0
I
PP
= 0.5 I
O
I
PP
= 0.75 I
O
ISL6219
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參數(shù)描述 |
|---|---|
| ISL6219 WAF | 制造商:Harris Corporation 功能描述: |
| ISL6219A | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Precision Multi-Phase BUCK PWM Controller for Mobile Applications |
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| ISL6219ACA | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR) |
| ISL6219ACA-T | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR) |
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