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參數(shù)資料
| 型號： | ISL6142IBZA |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | XTAL PLAS SMT 13X5 4PAD |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| 封裝： | LEAD FREE, PLASTIC, MS-012-AB, SOIC-14 |
| 文件頁數(shù)： | 14/23頁 |
| 文件大?。?/td> | 452K |
| 代理商： | ISL6142IBZA |
14
Applications Information
Typical Values for a representative
system; which assumes:
43V to 71V supply range; 48 nominal; UV = 43V; OV = 71V
1A of typical current draw; 2.5 Amp Over-Current
100
μ
F of load capacitance (CL); equivalent RL of 48
(R = V/I = 48V/1A)
R1: 0.02
(1%)
R2: 10
(5%)
R3: 18k
(5%)
R4: 549k
(1%)
R5: 6.49k
(1%)
R6: 10k
(1%)
R7/R8: 400
(1%)
R9: 4.99K
(1%)
R10: 5.10K
(10%)
C1: 150nF (25V)
C2: 3.3nF (100V)
C3: 1500pF (25V)
Q1: IRF530 (100V, 17A, 0.11
)
Q2: N-Channel logic FET
Quick Guide to Choosing Component
Values
(See fig 29 for reference)
This section will describe the minimum components needed
for a typical application, and will show how to select
component values. Note that “typical” values may only be
good for this application; the user may have to select
alternate component values to optimize performance for
other applications. Each block will then have more detailed
explanation of how the device works, and alternatives.
R4, R5, R6 -
together set the Under-Voltage (UV) and Over-
Voltage (OV) trip points. When the power supply ramps up
and down, these trip points (and their hysteresis) will
determine when the GATE is allowed to turn on and off (UV
and OV do not control the PWRGD / PWRGD output). The
input power supply is divided down such that when the
voltage on the OV pin is below its threshold and the UV pin is
above its threshold their comparator outputs will be in the
proper state signaling the supply is within its desired
operating range, allowing the GATE to turn on. The
equations below define the comparator thresholds for an
increasing (in magnitude) supply voltage.
R
5
FIGURE 29. TYPICAL APPLICATION WITH MINIMUM COMPONENTS
ISL6142
V
DD
OV
CT
V
EE
SENSE GATE
DRAIN
PWRGD
R4
R5
R6
R1
R2R3 C2
C1
Q1
CL
GND
GND
-48V IN
-48V OUT
RL
IS-
IS+
R8
R7
C3
DIS
IS
OUT
FAULT
UV
R9
R10
ADC
Logic
Supply
Q2
V
UV
R
R
6
)
+
+
-----------------+
R
6
1.255
×
=
(EQ. 1)
V
OV
R
----------------------------------------
R
6
R
+
+
1.255
×
=
(EQ. 2)
ISL6142, ISL6152
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