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参数资料
| 型号： | ISL62871HRUZ-T |
| 厂商： | Intersil |
| 文件页数： | 12/25页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 16-TQFN |
| 标准包装： | 3,000 |
| 系列： | Robust Ripple Regulator™ (R³) |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 100% |
| 电源电压： | 3.3 V ~ 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： | -10°C ~ 100°C |
| 封装/外壳： | 16-UFQFN |
| 包装： | 带卷 (TR) |
ISL62871, ISL62872
The ISL62872 V SET1 setpoint is written as Equation 9:
The equation for the value of R SET1 is written as
V SET1 = V REF
R SET1 = R SET2 ? ? ----------------------- – 1 ?
(EQ. 9)
The ISL62872 V SET2 setpoint is written as Equation 10:
Equation 13:
? K V SET2 ?
? V REF ?
(EQ. 13)
V SET2 = V REF ? ? 1 + --------------------------------------------------------------------- ?
? R SET1 ?
? R SET2 + R SET3 + R SET4 ?
(EQ. 10)
The sum of R SET1 and R SET2 programming resistors should
be approximately 300k Ω as shown in Equation 14 otherwise
V SET3 = V REF ? ? 1 + -------------------------------------------- ?
The ISL62872 V SET3 setpoint is written as Equation 11:
? R SET1 + R SET2 ?
(EQ. 11)
? R SET3 + R SET4 ?
The ISL62872 V SET4 setpoint is written as Equation 12:
adjust the value of R SET2 and repeat the calculations.
R SET1 + R SET2 ? 300k Ω (EQ. 14)
Equations 15 and 16 give the specific V SET gain equations
for the ISL62871 setpoint reference voltages.
The ISL62871 V SET1 setpoint is written as Equation 15:
V SET4 = V REF ? ? 1 + --------------------------------------------------------------------- ?
V SET1 = V REF
? R SET4 ?
? R SET1 + R SET2 + R SET3 ?
(EQ. 12)
(EQ. 15)
The ISL62871 V SET2 setpoint is written as Equation 16:
V SET2 = V REF ? ? 1 + ------------------ ?
V OUT
R FB
FB
?
V COMP
? R SET1 ?
? R SET2 ?
(EQ. 16)
EA
+
+
V SET
?
V REF
500mV
V OUT
R FB
FB
?
+
EA
V COMP
V REF
SREF
SW0
+
V SET
?
SET0
SET1
SET2
SW1
SW2
SW3
SREF
SET0
SW0
SW1
FIGURE 9. ISL62871 VOLTAGE PROGRAMMING CIRCUIT
FIGURE 8. ISL62872 VOLTAGE PROGRAMMING CIRCUIT
Component Selection for ISL62871 Setpoint
Voltage Programming Resistors
TABLE 2. ISL62871 VID TRUTH TABLE
STATE
RESULT
VID0
1
0
CLOSE
SW0
SW1
V SREF
V SET1
V SET2
V OUT
V OUT1
V OUT2
First, determine the attenuation factor K . Next, assign an
initial value to R SET2 of approximately 150k Ω then calculate
R SET1 using Equation 13.
12
FN6707.0
August 14, 2008
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL62872HRUZ | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator |
| ISL62872HRUZ-T | 功能描述:IC REG CTRLR BUCK PWM 20-TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:Robust Ripple Regulator™ (R³) 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) |
| ISL62873 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator |
| ISL62873HRUZ-T | 功能描述:IC REG CTRLR BUCK PWM 16UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:Robust Ripple Regulator™ (R³) 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) |
| ISL62875 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator |
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