参数资料
| 型号： | ISL6363IRTZ |
| 厂商： | Intersil |
| 文件页数： | 25/32页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLER VR12 48TQFN |
| 标准包装： | 50 |
| 应用： | 控制器，Intel VR12 |
| 输入电压： | 5 V ~ 12 V |
| 输出数： | 2 |
| 输出电压： | 0.25 V ~ 1.52 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（6x6） |
| 包装： | 管件 |
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ISL6363
V droop 2R droop R ntcnet DCR
LL = ------------------ = ---------------------- × ----------------------------------------- × ------------ (EQ. 36)
I o
R i
R sum
V Cn = ? ----------------------------------------- × ------------ ? × I o
N ?
R sum
?
V droop 2R sen × R droop
Overcurrent Protection
Refer to Equation 1 on page 16 and Figures 16, 20 and 22;
resistor R i sets the droop current I droop . Tables 2 (page 19)
and 3 (page 19) show the internal OCP threshold. It is
recommended to design I droop without using the R comp resistor.
For example, the OCP threshold is 60μA for 3-phase solution. We
will design I droop to be 40.9μA at full load, so the OCP trip level is
1.5x of the full load current.
For inductor DCR sensing, Equation 28 gives the DC relationship
of V cn (s) and I o (s).
? ?
? R ntcnet DCR ?
(EQ. 28)
N
? R ntcnet + -------------- ?
Substitution of Equation 28 into Equation 1 gives Equation 29:
LOAD LINE SLOPE
Refer to Figure 9.
For inductor DCR sensing, substitution of Equation 29 into
Equation 2 gives the load line slope expression:
N
N
R ntcnet + --------------
For resistor sensing, substitution of Equation 33 into Equation 2
gives the load line slope expression :
LL = ------------------ = ----------------------------------------- (EQ. 37)
I o N × R i
Substitution of Equation 30 and rewriting Equation 36, or
substitution of Equation 34 and rewriting Equation 37 give the
same result in Equation 38:
I droop = ----- × ----------------------------------------- × ------------ × I o
R sum
R i
R droop = ---------------- × LL
2 R ntcnet DCR
N
R ntcnet + --------------
N
(EQ. 29)
I o
I droop
(EQ. 38)
R i = --------------------------------------------------------------------------------
N × ? R ntcnet + -------------- ? × I droop
Therefore:
2R ntcnet × DCR × I o
R sum
? N ?
(EQ. 30)
One can use the full load condition to calculate R droop . For
example, given I omax = 51A, I droopmax = 40.9μA and
LL = 1.9m Ω , Equation 38 gives R droop = 2.37k Ω .
It is recommended to start with the R droop value calculated by
Equation 38, and fine tune it on the actual board to get accurate
2 × --------------------------------------------------- × DCR × I omax
( R ntcs + R ntc ) × R p
R i = ------------------------------------------------------------------------------------------------------------------------- (EQ. 31)
N × ? --------------------------------------------------- + -------------- ? × I droopmax
R ntcs + R ntc + R p
? ?
Substitution of Equation 20 and application of the OCP condition
in Equation 30 gives Equation 31:
( R ntcs + R ntc ) × R p
R ntcs + R ntc + R p
? R sum ?
N
Where I omax is the full load current, I droopmax is the
corresponding droop current. For example, given N = 3,
R sum = 3.65k Ω , R p = 11k Ω , R ntcs = 2.61k Ω , R ntc = 10k Ω ,
DCR = 0.88m Ω , I omax = 51A and I droopmax = 40.9μA,
Equation 31 gives R i = 606 Ω .
load line slope. One should record the output voltage readings at
no load and at full load for load line slope calculation. Reading
the output voltage at lighter load instead of full load will increase
the measurement error.
Compensator
Figure 17 shows the desired load transient response waveforms.
Figure 23 shows the equivalent circuit of a voltage regulator (VR)
with the droop function. A VR is equivalent to a voltage source
(= VID) and output impedance Z out (s). If Z out (s) is equal to the
load line slope LL, i.e., constant output impedance, in the entire
frequency range, V O will have square response when I o has a
square change.
For resistor sensing, Equation 32 gives the DC relationship of
V cn (s) and I o (s).
Z out (s) = LL
I O
V Cn = ------------ × I o
R sen
N
(EQ. 32)
VID
VR
LOAD
VO
Substitution of Equation 32 into Equation 1 gives Equation 33:
I droop = ----- × ------------ × I o
R i
Therefore
2 R sen
N
(EQ. 33)
FIGURE 23. VOLTAGE REGULATOR EQUIVALENT CIRCUIT
N × I droop
2R sen × I o
R i = ---------------------------
(EQ. 34)
Intersil provides a Microsoft Excel-based spreadsheet to help
design the compensator and the current sensing network, so the
Substitution of Equation 34 and application of the OCP condition
in Equation 30 gives Equation 35:
VR achieves constant output impedance as a stable system.
Figure 26 shows a screenshot of the spreadsheet.
N × I droopmax
2R sen × I omax
R i = --------------------------------------
(EQ. 35)
A VR with an active droop function is a dual-loop system consisting
of a voltage loop and a droop loop which is a current loop.
Where I omax is the full load current, I droopmax is the corresponding
droop current. For example, given N = 3, R sen = 1m Ω , I omax = 53A
and I droopmax = 40.9μA, Equation 35 gives R i = 863 Ω .
25
However, neither loop alone is sufficient to describe the entire
system. The spreadsheet shows two loop gain transfer functions,
T1(s) and T2(s), that describe the entire system. Figure 24
conceptually shows T1(s) measurement set-up and Figure 25
FN6898.1
September 5, 2013
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相关代理商/技术参数 |
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| ISL6363IRTZ-T | 功能描述:IC CONTROLLER VR12 48TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6364ACRZ | 功能描述:IC CNTRLR DUAL IMVP7 VR12 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6364ACRZ-T | 功能描述:IC CNTRLR DUAL IMVP7 VR12 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6364AIRZ | 功能描述:IC CNTRLR DUAL IMVP7 VR12 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6364AIRZ-T | 功能描述:IC CNTRLR DUAL IMVP7 VR12 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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