参数资料
| 型号： | ISL8126IRZ |
| 厂商： | Intersil |
| 文件页数： | 31/39页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 32-QFN |
| 标准包装： | 60 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1.5MHz |
| 占空比： | 90% |
| 电源电压： | 3 V ~ 5.6 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： | -40°C ~ 85°C |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 包装： | 管件 |
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ISL8126
I AVG = (I CS1 + I CS2 ) / 2
I AVG_CS = I AVG or I CS1
ISHARE = I AVG_CS + 15μA
ISET = I AVG_CS + 15μA + I CSH_ERR
ERROR
AMP 1
ERROR
AMP 2
+
∑
-
-
∑
I CSH_ERR
- ∑
∑
SHARE BUS
R ISHARE
I AVG_CS
CURRENT
MIRROR
BLOCK
I AVG_CS +15μA
ISHARE
I AVG_CS +15μA
-
I CS1
CURRENT
CORRECTION
BLOCK
I CSH_ERR
20mV
+
V ERROR1
CURRENT
MIRROR
BLOCK
I CSH_ERR
CURRENT
CORRECTION
I CS2
+
-
I AVG_CS
CURRENT
CORRECTION
BLOCK
-
+
V ERROR2
VCC
400mV
VSEN2-
BLOCK
R ISET
ISET
I CSH_ERR
R ISHARE =R ISET /N CTRL
VSEN1- VSEN1+
VMON1
FIGURE 22. SIMPLIFIED CURRENT SHARE AND INTERNAL BALANCE IMPLEMENTATION
Current Share Control in Multiphase Single
Output with Shared COMP Voltage
In multiphase/multi-IC implementation with one single error
amplifier for the voltage loop, all COMP pins must be tied
together. Therefore, all other channels’ error amplifiers that are
not used in voltage loop should be disabled with their
corresponding VSEN- pulled to VCC, as shown in Figure 23.
For current sharing purposes, all ISHARE pins must also be tied
together. The share bus (V ISHARE ) represents the average current
of all ISL8126s connected to the same ISHARE bus. The ISHARE
pin sources a copy of the I AVG_CS with 15μA offset (I AVG_CS
equals to I AVG or I CS1 depending upon the configuration). The
ISET pin sources out a copy of I AVG_CS , I CSH_ERR and 15μA
offset. I CSH_ERR on the ISET pin makes the voltage at the ISET
pin track the voltage at the ISHARE pin with 20mV offset. Thus,
I CSH_ERR represents the difference of an individual ISL8126
current to the average current (ISHARE). The current share error
signal (I CSH_ERR ) is then fed into the current correction block to
adjust each channel’s PWM pulse accordingly.
31
If one single external resistor is used as R ISHARE connecting the
ISHARE bus to ground for all the ICs in parallel, R ISHARE should
be set equal to R ISET /N CTRL (where N CNTL is the number of the
ISL8126 controllers in parallel or multiphase operations), and
the share bus voltage (V ISHARE ) set by the R ISHARE , represents
the average current of all channels. R ISHARE can also be set by
putting one resistor in each IC’s ISHARE pin and using the same
value with R ISET (R ISHARE = R ISET ), which results in the total
equivalent resistance value as R ISET /N CTRL .
The current share function provides at least 10% overall accuracy
between ICs, 5% within the IC when using a 1% resistor to sense
a 10mV signal. The current share bus works for up to 12-phase.
FN7892.1
August 16, 2012
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相关代理商/技术参数 |
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| ISL8126IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8126IRZ-T7A | 制造商:Intersil Corporation 功能描述:SCALABLE 2-PHASE CONTROLLER W/INTEGRATED DRIVERS, IND, 32LD - Tape and Reel 制造商:Intersil Corporation 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN |
| ISL8126IRZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8128IAZ-TK | 制造商:Intersil Corporation 功能描述:PB-FREE SYNC BUCK PWM CONT. W/ 4.5V-28V |
| ISL8130 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Advanced Single Universal Pulse-Width Modulation (PWM) Controller |
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