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ISL6721 の電気的特性と機能

ISL6721のメーカーはIntersil Corporationです、この部品の機能は「Flexible Single Ended Current Mode PWM Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL6721
部品説明 Flexible Single Ended Current Mode PWM Controller
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL6721 Datasheet, ISL6721 PDF,ピン配置, 機能
®
Data Sheet
August 2003
ISL6721
FN9110.1
Flexible Single Ended Current Mode PWM
Controller
The ISL6721 is a low power, single-ended pulse width
modulating (PWM) current mode controller designed for a
wide range of DC-DC conversion applications including
boost, flyback, and isolated output configurations. Peak
current mode control effectively handles power transients
and provides inherent over-current protection. Other
features include a low power mode where the supply current
drops to less than 200µA during over voltage and over
current shutdown faults.
This advanced BiCMOS design features low operating
current, adjustable operating frequency up to 1MHz,
adjustable soft-start, and a bi-directional SYNC signal that
allows the oscillator to be locked to an external clock for
noise sensitive applications.
Ordering Information
TEMP. RANGE
PART NUMBER
(oC)
PACKAGE
PKG.
DWG. #
ISL6721AB
-40 to 105 16 Ld SOIC M16.15
ISL6721AV
-40 to 105 16 Ld TSSOP M16.173
Features
• 1A MOSFET Gate Driver
• 100µA Startup Current
• Fast Transient Response with Peak Current Mode Control
• Adjustable Switching Frequency up to 1MHz
• Bi-Directional Synchronization
• Low Power Disable Mode
• Delayed Restart from OV and OC Shutdown Faults
• Adjustable Slope Compensation
• Adjustable Soft Start
• Adjustable Over Current Shutdown Delay
• Adjustable UV and OV Monitors
• Leading Edge Blanking
• Integrated Thermal Shutdown
• 1% Tolerance voltage Reference
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• Isolated Buck and Flyback Regulators
• Boost Regulators
Pinout
ISL6721 (SOIC, TSSOP)
TOP VIEW
GATE 1
ISENSE 2
SYNC 3
SLOPE 4
UV 5
OV 6
RTCT 7
ISET 8
16 VC
15 PGND
14 VCC
13 VREF
12 LGND
11 SS
10 COMP
9 FB
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.

1 Page





ISL6721 pdf, ピン配列
ISL6721
Typical Application - 48V Input Dual Output Flyback, 3.3V @ 2.5A, 1.8V @ 1.0A
VIN+ P9
36-75V
C1
V IN -
R1
R2
SYNC
R5
R6
Q3
VR1
R24
C2
C3
C18
CR6
TP1
Q1
T1
ISOLATION
XFMR
CR5
R21
SP1
SP2
C21
+ C15
C5 CR2
C17
CR4
C19 +
C22
+
C20
R16
R17
C6
R19
U2
C14
+ C16
+3.3V
+1.8V
R18
RETURN
R4 R3
R23
R25
Q2 C4
D1
TP3
TP5
D2
R22
TP2
U4
GATE
IS E N S E
SYNC
SLOPE
UV
OV
RTCT
ISET
VC
PGND
VCC
VREF
LGND
SS
COMP
VFB
R8
R10
C7 C8
R7
R11
R12
R9
R15
C13
U3
R20
R26
R27
R13
C9
R14
TP4
C12
C11
C10
3


3Pages


ISL6721 電子部品, 半導体
ISL6721
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic.
are at TA =
92V5o<CVC(CCo=nVtinCu<ed20) V
±10%,
Rt
=
11k,
Ct
=
330
pF,
TA
=
-40
to
105oC
(Note
3),
Typical
values
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
SOFT-START
Charging Current
SS = 2V
-40 -55 -70 µA
Charged Threshold Voltage
4.26 4.50 4.74
V
Initial Over Current Discharge Current
Sustained OC Threshold < SS <
30
40
55
µA
Charged Threshold
Sustained Over Current Threshold Voltage
Charged Threshold minus
0.095
0.125
0.155
V
Fault Discharge Current
SS = 2V
0.25 1.0 - mA
Reset Threshold Voltage
0.22 0.27 0.31
V
SLOPE COMPENSATION
Charge Current
SLOPE = 2V, 0 - 105oC
-40 - 105oC
-45 -53 -65 µA
-41 -53 -65
Slope Compensation Gain
Discharge Voltage
GATE OUTPUT
Fraction of slope voltage added to
ISENSE (Note 5)
VRTCT = 4.5V
0.095
-
0.100
0.1
0.105
0.2
V/V
V
Gate Output Limit Voltage
Gate VOH
Gate VOL
VC = 20V, CGATE = 1nF,
IOUT = 0mA
VC - GATE, VC = 10V,
IOUT = 150mA
GATE - PGND, IOUT = 150mA
IOUT = 10mA
11.0
-
-
13.5
1.5
1.2
0.6
16.0
2.2
1.5
0.8
V
V
V
Peak Output Current
VC = 20V, CGATE = 1nF
(Note 5)
- 1.0 -
A
Output “Faulted” Leakage
VC = 20V, UV = 0V, GATE = 0V
-
-1 -50 µA
GATE = 2V
1.2 2.6 - mA
Rise Time
VC = 20V, CGATE = 1nF
1V < GATE < 9V
- 60 100 nS
Fall Time
VC = 20V, CGATE = 1nF
1V < GATE < 9V
- 15 40 nS
Minimum ON time
ISET = 0.5V; VFB = 0V; VC = 11V
ISENSE to GATE w/10:1 Divider
RTCT = 4.75V through 1k
(Note 5)
-
- 110 nS
OVER CURRENT PROTECTION
Minimum ISET Voltage
- - 0.35 V
Maximum ISET Voltage
1.2 - - V
Restart Delay
(Note 5)
150 295 445 mS
OV & UV VOLTAGE MONITOR
Over Voltage Threshold
2.4 2.5 2.6
V
Under Voltage Fault Threshold
1.38 1.45 1.52
V
Under Voltage Clear Threshold
1.41 1.53 1.62
V
Under Voltage Hysteresis Voltage
20 50 100 mV
6

6 Page



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