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Details, datasheet, quote on part number:ISL6740IB
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| Part: | ISL6740IB |
| Category: | Power Management => PWM Controllers |
| Description: | PWM Controller For Half Bridge And Bus Converter Applications <<<>>> <<<>>>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. |
| Company: | Intersil Corporation |
| Datasheet: | Download ISL6740IB datasheet File size : 640 kB |
| Request For quote: | Find where to buy ISL6740IB
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Datasheet text preview:
®
ISL6740, ISL6741
D a ta Sheet Ja n u ar y 2004 FN9111.2
Flexible Double Ended Voltage and Current Mode PWM Controllers
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.
Features
· Precision Duty Cycle and Deadtime Control · 95µA Startup Current · Adjustable Delayed Over Current 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 Under Voltage Lockout
PKG. DWG. #
Ordering Information
PART NUMBER ISL6740 IB ISL6740 IV ISL6741 IB ISL6741 IV TEMP. RANGE (oC) -40 to 105 -40 to 105 -40 to 105 -40 to 105 PA CKAGE 16 Ld SOIC 16 Ld TSSOP 16 Ld SOIC 16 Ld TSSOP
· Fault Signal · Tight Tolerance Voltage Reference Over Line, Load, and Temperature
M16.15 M 16.173 M16.15 M 16.173
Applications
· Telecom and Datacom Power · Wireless Base Station Power · File Server Power · Industrial Power Systems · DC Transformers and Buss Regulators
Add -T suffix to part number for tape and reel packaging x= 0 1 CONTROL MODE Voltage Mode Current Mode
Pinout
ISL6740, ISL6741 (SOIC, TSSOP) TOP VIEW
O U TA 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 1 1 O TS 1 0 FAULT 9 SS
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. 2004. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
Functional Block Diagram
ISL6740
V DD V R EF SYN C
V R EF 5 .0 0 V 1% EN AB L E
FL 1 00
Q T Q
OUT A
+ BG + GND
2
1 .0 0 V UV IR T C RTC IR T D RTD SC S ET CT CS V E R ROR OT S
OUT B
4 .5 k
P W M TOGGLE
S C S/D In t e r n a l O T Shutdown 1 3 0 - 150 C IN H IB IT /V IN UV + IN H IB IT E X T . SYNC N _ S Y N C OUT B i - D i re c t i o n a l S yn c h r o n i z a t i o n
S Q Q
O C S/D
V RE F 70µ A
S Y N C IN S S LOW
R
ON
S C LATCH
SS
ISL6740, ISL6741
S S DONE O s c il la t o r 4 .5 V CLK S S CLAMP + 30 0 k
O C LATCH
S R Q Q
1 5µ A
S ho rt Circuit D e te c tio n
Q
S S HI
+ 4 .2 5 V
S S DONE
Q
5 0 µS R E T R IG G E R A B L E O N E SHOT IN H IB IT + O C DETECT
S R Q Q
S S LOW
+ -
0 .2 7 V
F A U L T LATCH S E T DOMINANT
S R Q Q
0 .6 V
FL
0 .4
+ -
PW M C O M P AR A T O R
P W M LATCH R ES ET D O M IN A N T
S C S/D O C S/D VREF + BG + -
F AU L T
SS 0 .4 0 .5 V RE F/2 V RE F UV 4.65 V +
Functional Block Diagram (Continued)
ISL6741
V DD VR EF S YN C
VR EF 5 .0 0 V 1% E N AB L E
FL 100
Q T Q
OUT A
+ BG + GND
O UT B
4 .5 k
P W M TOGGLE
3
UV IR T C RTC IR T D RTD SCSET CT CS V E R R OR OT S
S C S/D In t e rn a l O T Shutdown 1 3 0 - 150 C IN H IB IT /V IN UV 1 .0 0 V + IN H IB IT E X T . SYNC
R Q
V REF 70 µ A
N _ S Y N C OUT B i- D ire c t io n a l S y n c h ro n i z a t i o n S C LATCH S Y N C IN
S Q
ON
SS
ISL6740, ISL6741
O s c il la t o r 4 .5 V CL K
+ 30 0 k
S S DONE
15µ A
S S CLAMP
S h o rt Circuit D et ec tio n
S S DONE S S LOW + 0 .2 7 V
IN H IB IT + O C DETECT
S R Q Q
F AU L T LATCH S ET DOMINANT
S R Q Q
0.6 V
FL
80 m V + + 0 .2 5
PW M C O M P AR A T O R
P W M LATCH RESET D O M IN A N T S C S/D V REF SS 0 .2 V R E F /2 + V R EF UV 4.65 V + BG + -
F AU L T
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