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參數(shù)資料
| 型號： | ISL6269CRZ-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single Phase PWM Controller for Mobile Graphical Processing Unit (GPU) |
| 中文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, MO-220-VGGC, QFN-16 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大小： | 395K |
| 代理商： | ISL6269CRZ-T |
9
FN9177.0
June 14, 2005
Theory of Operation
Modulator
The ISL6269 is a hybrid of fixed frequency PWM control, and
variable frequency hysteretic control. The term “Ripple” in
the name “Robust-Ripple-Regulator” refers to the converter
output inductor ripple current, not the converter output ripple
voltage. The output voltage is regulated to 600mV at the FB
pin with respect to the GND pin. The FB pin is the inverting
input of the error amplifier. The frequency response of the
feedback control loop is tuned with a type-two compensation
network connected across the FB pin and COMP pin.
The R
3
modulator synthesizes an AC signal V
R
, which is an
ideal representation of the output inductor ripple current. The
duty-cycle of V
R
is derived from the voltage measured at the
VIN pin and VO pin with respect to the GND pin.
Transconductance amplifiers convert the VIN and VO
voltages into currents that charge and discharge the ripple
capacitor C
R
. The positive slope of V
R
can be written as:
V
RPOS
gm
V
IN
V
O
–
=
The negative slope of V
R
can be written as:
V
RNEG
gm V
O
=
A voltage V
W
is referenced with respect to the error amplifier
output voltage V
COMP
, creating a window-voltage envelope
into which voltage V
R
is compared. The V
R,
V
COMP,
and V
W
signals feed into a hysteretic window comparator in which
V
COMP
is the lower threshold voltage and V
W
is the higher
threshold voltage. PWM pulses are generated as V
R
traverses the V
W
and V
COMP
thresholds. The charging and
discharging rates of capacitor C
R
determine the PWM
switching frequency for a given amplitude of V
W
with respect
to V
COMP
. The R
3
regulator simultaneously affects switching
frequency and duty cycle because it modulates both edges
of the PWM pulses.
(
)
(
)
(EQ. 1)
(EQ. 2)
FIGURE 3. MODULATOR WAVEFORMS DURING LOAD TRANSIENT
μs
V
RIPPLE CAPACITOR VOLTAGE C
R
PWM
ERROR AMPLIFIER VOLTAGE V
COMP
WINDOW VOLTAGE V
W
ISL6269
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參數(shù)描述 |
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| ISL6269EVAL2Z | 功能描述:EVALUATION BOARD FOR ISL6269 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:Robust Ripple Regulator™ (R³) 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6269IRZ | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:Robust Ripple Regulator™ (R³) 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6269IRZ-T | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:Robust Ripple Regulator™ (R³) 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6271A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Integrated XScale Regulator |
| ISL6271ACR | 功能描述:IC REG PMIC 1BUCK 2LDO 20-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 應(yīng)用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件 |
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