ISL6740.pdf 데이터시트 (총 28 페이지) - 파일 다운로드 ISL6740 데이타시트 다운로드

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Flexible Double Ended Voltage and Current Mode PWM
Controllers
ISL6740, ISL6741
The ISL6740, ISL6741 family of adjustable frequency, low
power, pulse width modulating (PWM) voltage mode (ISL6740)
and current mode (ISL6741) controllers is designed for a wide
range of power conversion applications using half-bridge, full
bridge, and push-pull configurations. These controllers provide
an extremely flexible oscillator that allows precise control of
frequency, duty cycle, and deadtime.
This advanced BiCMOS design features low operating current,
adjustable switching frequency up to 1MHz, adjustable soft-
start, internal and external over-temperature protection, fault
annunciation, and a bidirectional SYNC signal that allows the
oscillator to be locked to paralleled units or to an external
clock for noise sensitive applications.
Ordering Information
PART
NUMBER
(Notes 2, 3)
PART TEMP. RANGE
MARKING
(°C)
PACKAGE
PKG.
DWG. #
ISL6740IBZ 6740IBZ
(Note 1)
-40 to +105 16 Ld SOIC M16.15
(Pb-free)
ISL6740IVZ ISL67 40IVZ -40 to +105 16 Ld TSSOP M16.173
(Note 1)
(Pb-free)
ISL6741IB ISL6741IB -40 to +105 16 Ld SOIC M16.15
ISL6741IBZ 6741IBZ
(Note 1)
-40 to +105 16 Ld SOIC M16.15
(Pb-free)
ISL6741IVZ ISL67 41IVZ -40 to +105 16 Ld TSSOP M16.173
(Note 1)
(Pb-free)
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details
on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-
free material sets, molding compounds/die attach materials, and
100% matte tin plate plus anneal (e3 termination finish, which is
RoHS compliant and compatible with both SnPb and Pb-free
soldering operations). Intersil Pb-free products are MSL classified
at Pb-free peak reflow temperatures that meet or exceed the Pb-
free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information
page for ISL6740, ISL6741. For more information on MSL please
see techbrief TB363.
ISL674x
x=
0
1
CONTROL MODE
Voltage Mode
Current Mode
Features
• Precision Duty Cycle and Deadtime Control
• 95µA Start-up Current
• Adjustable Delayed Overcurrent Shutdown and Re-start
(ISL6740)
• Adjustable Short Circuit Shutdown and Re-start
• Adjustable Oscillator Frequency Up to 2MHz
• Bidirectional Synchronization
• Inhibit Signal
• Internal Over-Temperature Protection
• System Over-Temperature Protection Using a Thermistor or
Sensor
• Adjustable Soft-start
• Adjustable Input Undervoltage Lockout
• Fault Signal
• Tight Tolerance Voltage Reference Over Line, Load, and
Temperature
• Pb-Free Available (RoHS Compliant)
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• DC Transformers and Buss Regulators
Pin Configuration
ISL6740, ISL6741
(16 LD SOIC, 16 LD TSSOP)
TOP VIEW
OUTA 1
GND 2
SCSET 3
CT 4
SYNC 5
CS 6
VERROR 7
UV 8
16 OUTB
15 VREF
14 VDD
13 RTD
12 RTC
11 OTS
10 FAULT
9 SS
December 2, 2011
FN9111.6
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2003, 2004, 2007, 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.

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Functional Block Diagram
VDD
VREF
SYNC
VREF
5.00 V
1%
+ ENABLE
-
100
BG +-
4.5k
GND
INTERNAL N_SYNC OUT
OT SHUTDOWN
+130°C TO +150°C
BI-DIRECTIONAL
SYNCHRONIZATION SYNC IN
INHIBIT/VIN UV
UV
1.00V +
-
INHIBIT
EXT. SYNC
IRTC
RTC
IRTD
RTD
SCSET
CT
OSCILLATOR
CLK
SHORT CIRCUIT
DETECTION
SS DONE
CS
VERROR
OTS
0.4
0.4
0.6V +-
OC DETECT
+ COMPPWAMRATOR
--
SS
0.5
ISL6740
FL
Q
T
Q
PWM TOGGLE
SC S/D
SS LOW
SQ
RQ
SC LATCH
OC S/D
-
+
4.5V
SS CLAMP
SS DONE
300k
OC LATCH
SQ
RQ
OUTA
OUTB
VREF
70µA
ON
15µA
SS
Q
Q
50µs
RETRIGGERABLE
ONE SHOT
SQ
RQ
PWM LATCH
RESET
DOMINANT
VREF/2
-
+
INHIBIT
SS HI
+
-
4.25V
SS LOW
+- 0.27V
FAULT LATCH
SET DOMINANT
S Q FL
RQ
SC S/D
OC S/D
VREF UV 4.65V
-
+
BG +-
VREF
FAULT

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Functional Block Diagram (Continued)
VDD
VREF
SYNC
BG +-
+
-
VREF
5.00 V
1%
ENABLE
100
4.5k
GND
INTERNAL
N_SYNC OUT
OT SHUTDOWN
+130°C TO +150°C
INHIBIT/VIN UV
BI-DIRECTIONAL
SYNCHRONIZATION
SYNC IN
UV
1.00 V
+
-
INHIBIT EXT. SYNC
IRTC
RTC
IRTD
RTD
SCSET
CT
OSCILLATOR
CLK
SHORT CIRCUIT
DETECTION
SS DONE
CS
VERROR
OTS
80mV
0.25
0.6V +-
OC DETECT
PWM
+ COMPARATOR
--
SS
0.2
ISL6741
FL
Q
T
Q
PWM TOGGLE
SC S/D
SC LATCH
SQ
RQ
-
+
4.5VSS CLAMP
300k
SS DONE
OUTA
OUTB
VREF
70µA
ON
15µA
SS
SQ
RQ
PWM LATCH
RESET
DOMINANT
VREF/2 -
+
INHIBIT
SS LOW
+- 0.27V
FAULT LATCH
SET DOMINANT
S Q FL
RQ
SC S/D
VREF UV 4.65V
-
+
BG +-
VREF
FAULT

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Typical Application (ISL6740) - 48V Input DC Transformer, 12V @ 8A Output (ISL6740EVAL1)
VIN+
L1
C2
QH
TP1
L3
C13
R10
QR1 C11
SP1
+12V
QR3
T1
R8
C9 C8
L2 RTN
C1
T2 R9
R2
CR3
QL QR2 QR4
C14 R11
C12
R1
VIN-
TP6
C3
C7
C4
C5
R7
Q5
U1
HIP2101
VDD LO
HB VSS
HO LI
HS HI
R17
CR2
CR1
TP4 R5
R14 R6
VREF
RT1
TP5
R3
C15
U3
GND
OUTB
OUTA
VDD
VERROR
CS
CT
RTC
R19
R13
C10
C18
TP2
C17
D1
R18
C6
R12 C16 R15

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Typical Application (ISL6740) - 36V to 75V Input, Regulated 12V @ 8A Output (ISL6740EVAL2Z)
VIN+
L1
C2
QH
L3
CR5
T1
R26
QR1
C11
R8
SP1
QR3
+
+12V
C21
C13 C9 C8
TP1 R10
L2 RTN
C1 CR4
T2
36V TO 75V
R1
R2
CR3
C3
C7
C4
QL
U1
HIP2101
VDD LO
HB VSS
HO LI
HS HI
TP4
CR6
R27
C14
R11
QR2
CR2
R9
QR4
C12
CR1
R5
RT1
R14 R6
VREF
C10
TP2
+ 12V
C5
TP5
U3
C18
R19
R4
VIN-
TP6
R17
R7
Q5
D1
C6
R3
C15
R18
GND
OUTB
OUTA
VDD
VERROR
CS
CT
RTC
R12
C16
R13
C17
R15
R19 R20
R23
C22
R25 C20
R21 C19
U2
U4
D2 R24