|
|
PDF ISL8843 Data sheet ( Hoja de datos )
| Número de pieza | ISL8843 | |
| Descripción | Industry Standard Single-Ended Current Mode PWM Controller | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ISL8843 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
®
Data Sheet
January 3, 2006
ISL8843
FN9238.1
Industry Standard Single-Ended Current
Mode PWM Controller
The ISL8843 is an industry standard drop-in replacement for
the popular 28C43 and 18C43 PWM controllers suitable for
a wide range of power conversion applications including
boost, flyback, and isolated output configurations. Its fast
signal propagation and output switching characteristics
make this an ideal product for existing and new designs.
Features include 30V operation, low operating current, 90µA
start-up current, adjustable operating frequency to 2MHz,
and high peak current drive capability with 20ns rise and fall
times.
PART NUMBER
ISL8843
RISING UVLO
8.4V
MAX. DUTY CYCLE
100%
Ordering Information
PART
NUMBER
PART
TEMP.
PKG.
MARKING RANGE (°C) PACKAGE DWG. #
ISL8843ABZ 8843 ABZ
(See Note)
-40 to 105 8 Ld SOIC M8.15
(Pb-free)
ISL8843AUZ 8843Z
(See Note)
-40 to 105 8 Ld MSOP M8.118
(Pb-free)
ISL8843MBZ 8843 MBZ
(See Note)
-55 to 125 8 Ld SOIC M8.15
(Pb-free)
ISL8843MUZ 843MZ
(See Note)
-55 to 125 8 Ld MSOP M8.118
(Pb-free)
Add -T to part number for Tape and Reel packaging.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
Features
• 1A MOSFET gate driver
• 90µA start-up current, 125µA maximum
• 35ns propagation delay current sense to output
• Fast transient response with peak current mode control
• 30V operation
• Adjustable switching frequency to 2MHz
• 20ns rise and fall times with 1nF output load
• Trimmed timing capacitor discharge current for accurate
deadtime/maximum duty cycle control
• 1.5MHz bandwidth error amplifier
• Tight tolerance voltage reference over line, load, and
temperature
• ±3% current limit threshold
• Pb-free plus anneal available and ELV, WEEE, RoHS
Compliant
Applications
• Telecom and datacom power
• Wireless base station power
• File server power
• Industrial power systems
• PC power supplies
• Isolated buck and flyback regulators
• Boost regulators
Pinout
ISL8843
(8 LD SOIC, MSOP)
TOP VIEW
COMP 1
FB 2
CS 3
RTCT 4
8 VREF
7 VDD
6 OUT
5 GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2005, 2006 All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL8843
Electrical Specifications
ISL8843A - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and
Typical Application schematic. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -40 to 105°C (Note 3) Typical values
are at TA = 25°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
FB Input Bias Current
COMP Sink Current
COMP Source Current
COMP VOH
COMP VOL
PSRR
VFB = 0V
VCOMP = 1.5V, VFB = 2.7V
VCOMP = 1.5V, VFB = 2.3V
VFB = 2.3V
VFB = 2.7V
Frequency = 120Hz, VDD = 12V to
18V (Note 5)
-1.0
1.0
-0.4
4.80
0.4
60
-0.2 1.0
µA
- - mA
- - mA
- VREF V
- 1.0 V
80 - dB
OSCILLATOR
Frequency Accuracy
Frequency Variation with VDD
Temperature Stability
Initial, TA = 25°C
TA= 25°C, (F30V - F9V)/F30V
(Note 5)
48 51 53 kHz
-
0.2 1.0
%
- - 5%
Amplitude, Peak to Peak
Static Test
- 1.75 -
V
RTCT Discharge Voltage (Valley Voltage)
Static Test
- 1.0 -
V
Discharge Current
RTCT = 2.0V
6.5 7.8 8.5 mA
OUTPUT
Gate VOH
Gate VOL
Peak Output Current
Rise Time
Fall Time
GATE VOL UVLO Clamp Voltage
PWM
VDD - OUT, IOUT = -200mA
OUT - GND, IOUT = 200mA
COUT = 1nF (Note 5)
COUT = 1nF (Note 5)
COUT = 1nF (Note 5)
VDD = 5V, ILOAD = 1mA
-
1.0 2.0
V
-
1.0 2.0
V
- 1.0 -
A
- 20 40 ns
- 20 40 ns
- - 1.2 V
Maximum Duty Cycle
COMP = VREF
93.5 95 - %
Minimum Duty Cycle
COMP = GND
- - 0%
NOTES:
3. Specifications at -40°C and 105°C are guaranteed by 25°C test with margin limits.
4. This is the VDD current consumed when the device is active but not switching. Does not include gate drive current.
5. Guaranteed by design, not 100% tested in production.
Electrical Specifications
ISL8843M - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and
Typical Application schematic. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -55 to 125°C (Note 6), Typical values
are at TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
UNDERVOLTAGE LOCKOUT
START Threshold
8.0 8.4 9.0
V
STOP Threshold
7.3 7.6 8.0
V
Hysteresis
- 0.8 -
V
Startup Current, IDD
Operating Current, IDD
Operating Supply Current, ID
REFERENCE VOLTAGE
VDD < START Threshold
(Note 7)
Includes 1nF GATE loading
- 90 125 µA
- 2.9 4.0 mA
-
4.75 5.5
mA
Overall Accuracy
Over line (VDD = 12V to 18V), load,
temperature
4.900
5.000
5.050
V
5 FN9238.1
January 3, 2006
5 Page 
ISL8843
Small Outline Plastic Packages (SOIC)
N
INDEX
AREA
E
-B-
H
0.25(0.010) M B M
123
-A- D
SEATING PLANE
A
L
h x 45°
-C-
e A1
B
0.25(0.010) M C A M B S
α
0.10(0.004)
C
NOTES:
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication Number 95.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Inter-
lead flash and protrusions shall not exceed 0.25mm (0.010 inch) per
side.
5. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch).
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
M8.15 (JEDEC MS-012-AA ISSUE C)
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
INCHES
MILLIMETERS
SYMBOL MIN MAX MIN MAX NOTES
A
0.0532 0.0688 1.35
1.75
-
A1
0.0040 0.0098 0.10
0.25
-
B
0.013 0.020 0.33
0.51
9
C
0.0075 0.0098 0.19
0.25
-
D
0.1890 0.1968 4.80
5.00
3
E
0.1497 0.1574 3.80
4.00
4
e 0.050 BSC
1.27 BSC
-
H
0.2284 0.2440 5.80
6.20
-
h
0.0099 0.0196 0.25
0.50
5
L
0.016 0.050 0.40
1.27
6
N8
87
α 0° 8° 0° 8° -
Rev. 1 6/05
11 FN9238.1
January 3, 2006
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ISL8843.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL8840A | (ISL8840A - ISL8845A) High Performance Industry Standard Single-Ended Current Mode PWM Controller | Intersil Corporation |
| ISL8841A | (ISL8840A - ISL8845A) High Performance Industry Standard Single-Ended Current Mode PWM Controller | Intersil Corporation |
| ISL8842A | (ISL8840A - ISL8845A) High Performance Industry Standard Single-Ended Current Mode PWM Controller | Intersil Corporation |
| ISL8843 | Industry Standard Single-Ended Current Mode PWM Controller | Intersil Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |