ISL6401.pdf 데이터시트 (총 13 페이지) - 파일 다운로드 ISL6401 데이타시트 다운로드

No Preview Available !

Data Sheet
October 21, 2015
ISL6401
FN9007.8
Synchronizing Current Mode PWM for
Subscriber Line Interface Circuits (SLICs)
The ISL6401 adjustable frequency, low power, pulse width
modulating (PWM) current mode controller is designed for a
wide range of DC/DC conversion applications including
boost, flyback, and isolated output configurations. The
device is optimized to provide a high performance, low-cost
solution for Ringing SLIC (RSLIC) ring and talk power
supplies. An integrated inverter allows for easy design of
negative voltage regulation circuits with a minimal amount of
external components. Internal soft-start minimizes start-up
stress without any external components. Peak current mode
control effectively handles Ring trip transients and provides
inherent overcurrent protection.
This advanced BiCMOS design features low operating
current, adjustable operating output frequency (50kHz to
600kHz), internal soft-start and a SYNC input that allows the
oscillator to be locked to an external clock for noise sensitive
applications. DC/DC conversion efficiency is optimized by
use of a low current sense voltage. A logic level shutdown
input is included, which reduces supply current to 55A in
the shutdown mode.
Pinouts
ISL6401 (SOIC)
TOP VIEW
SD 1
SYNC 2
CT 3
COMP 4
FB 5
NFB OUT 6
NFB IN 7
14 VCC
13 PVCC
12 GATE
11 PGND
10 GND
9 CS
8 NC
ISL6401 (QFN)
TOP VIEW
SYNC
CT
COMP
FB
NO
16 15 14
1
LO342NGER5RECO6MMEND7ED
O1R3SUP1P2ORTPEGDND
11 PGND
10 GND
9 CS
8
Features
• Positive and Negative Output Regulation
• Starting Supply Current . . . . . . . . . . . . . . . . . 100A (typ.)
• Quiescent Current . . . . . . . . . . . . . . . . . . . . . . 55A (typ.)
• Output Frequency Range. . . . . . . . . . . . 50kHz to 600kHz
• External Clock Synchronization
• Fast Transient Response with Peak Current Mode Control
• Internal Soft-Start
• Drives N-Channel MOSFET
• Logic Level Shutdown
• Leading Edge Blanking
• 1% Tolerance Voltage Reference Over Line and
Temperature
• Pb-Free Available (RoHS Compliant)
Applications
• VoIP/VoDSL Ringer and Off-Hook Voltage Generators
• Multi-Output Flyback Supplies
• Cable and DSL Modems
• Set-Top Boxes
• Wireless Local Loops
• LMDH and FTTH Supplies
• Boost Regulators
• Routers
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a trademark of Intersil Americas LLC.
Copyright © Intersil Americas LLC. 2001-2005, 2015. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

No Preview Available !

ISL6401
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
TEMP.
RANGE (°C)
PACKAGE
(RoHS Compliant)
PKG. DWG. #
ISL6401CBZ
-40 to 85
14 Ld SOIC (Pb-free)
M14.15
ISL6401CRZ (No longer available, recommended replacement:
ISL6401CBZ)
-40 to 85
16 Ld 4x4 QFN (Pb-free) L16.4x4
NOTES:
1. Add -T suffix for tape and reel packaging.
2. The parts with suffix ‘C’ are being tested to the industrial temperature grade. This has been updated in the table above. The IB and IR parts are being discontinued.
The affected parts are: ISL6401IB, ISL6401IBZ, ISL6401IB-T, ISL6401IBZ-T, ISL6401IR, ISL6401IRZ, ISL6401IR-T, ISL6401IRZ-T.
3. Intersil Pb-free 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.
Functional Block Diagram
4
5
FB
9 CS
10 14
1
GND VCC
SD
VREF
VOLTAGE
COMP
REFERENCE
ERROR
IBIAS
+ AMP
-
+- ICSCOMP
200K
ILIM
32
CT SYNC
OSC
S
RQ
PVCC 13
GATE 12
VREF
CS
SOFT-START
POR SOFT-
UVLO
START
CLK
ENPWM
TFF
CLK Q
R
- LVC
+
ICLCOMP
LEADING
EDGE
BLANKING
NC 8
NFB_IN
7
11
PWRGND
VCC
-
+
NFB
AMP
NFB-OUT
6
2 FN9007.8
October 21, 2015

No Preview Available !

ISL6401
Typical Application Schematic for 4 Line VoIP
VIN
9V TO
20V
VCC
+5V
10%
GND
C4
560pF
C5
220pF
E
C6 R1
0.027F 20K
R2
10K R3
1.24K
C1A-E
2.2F
35V
1 SD
VCC 14
2 SYNC
3 CT
PVCC 13
GATE 12
4 COMP GNDP 11
5 FB
GND 10
6 NFB
CS 9
7 NFB_IN NC 8
ISL6401
C2
1F
50V
8
0000
PRI
1
C3
1F
16V
Q1
IRLR2905
R6
100
T1 2
00
SEC
07
3
D1
+
C10A
330F
35V
06
4
05
IFLY0012
R7
220
MUR5120T3
D2
MUR5160T3
C8
330pF
C9
100F
100V
+
C7
1000pF
R5
0.025
1W
R4B
143K
GND
C11
1F
VOUT1 -24V,
120mA
VOUT2
C12
0.1F
-72V,
120mA
R4A
43.5K
NOTES:
4. C2 fit as close as possible to transformer.
5. T1 = IFLY0012 contacts: Coilcraft: (847) 516-7377 GCI Technology: (972) 423-8411 ext. 245
6. For custom specific designs or questions please contact Intersil at 1-888-INTERSIL or 321-724-7143.
3 FN9007.8
October 21, 2015

No Preview Available !

ISL6401
Absolute Maximum Ratings
Supply Voltage, VCC,PVCC . . . . . . . . . . . . . . . . GND -0.3V to +7.0V
PGND to GND  0.3V
Peak GATE Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A
ESD Classification . . . . . . . . . . . . . . . . . . . . . Class 1 (HBM, 2500V)
NFB Pin Voltage. . . . . . . . . . . . . . . . . . . . . . ±10V (Transient, 10ms)
Operating Conditions
Temperature Range
ISL6401C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
Supply Voltage Range (Typical). . . . . . . . . . . . . . . . . . . . . 5V 10%
Thermal Information
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
14 Lead SOIC (Note 6) . . . . . . . . . . . .
90
NA
16 Lead QFN (Note 7) . . . . . . . . . . . . .
46
9
Maximum Junction Temperature (Plastic Package) . -55°C to 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
(SOIC - Lead Tips Only)
For Recommended soldering conditions see Tech Brief TB389.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
7. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
8. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. JC, the
“case temp” is measured at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
9. All voltages are with respect to GND.
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic. VCC = +5.0V ±10%, TA = -40 to 85°C (Note 10), Typical values are at TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
VCC SUPPLY
Supply Voltage Range
4.5 5.0 5.5
V
Shutdown Supply Current
SHDN = GND
- 55 100 A
Start-Up Current
Operating Supply Current
VCC < 3.7V
(Note 11)
- 0.1 0.20 mA
- 3.7 6.0 mA
REFERENCE VOLTAGE
Output Voltage
1.237 1.25 1.262
V
Long Term Stability
NEGATIVE FEEDBACK
TA = 125°C, 1000 hours
- 5 - mV
Source Current
- 1.0 2.0 mA
CURRENT SENSE
Maximum Input Signal
0.2 0.260 0.3
V
Input Bias Current
-2.0 0.0 2.0 A
Overcurrent Threshold
0.4 0.52 0.6
V
ERROR AMPLIFIER
Open Loop Voltage Gain
- 78 - dB
Gain-Bandwidth Product
10 -
- MHz
Input Voltage
1.225 1.25 1.275
V
Input Bias Current
- 1.0 - A
PWM
Maximum Duty Cycle
47 48 50 %
Minimum Duty Cycle
COMP = 0V
- 0 -%
UNDERVOLTAGE LOCKOUT
Start Threshold
3.7 4.1 4.3
V
Stop Threshold
3.2 3.6 4.0
V
4 FN9007.8
October 21, 2015

No Preview Available !

ISL6401
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic. VCC = +5.0V ±10%, TA = -40 to 85°C (Note 10), Typical values are at TA = 25°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Start to Stop Hysteresis
0.2 0.5 0.8
V
SOFT-START - DIGITAL
COMP Rise Time
Rise from 0.5V to REF -1V
- 2048 clk -
OSCILLATOR
Gate Output Frequency
Ct = 560pF
90 100 108 kHz
Gate Output Frequency Range
50 - 600 kHz
Temperature Stability
- 5 -%
Sync. Frequency Range
1.1 Times the natural switching
frequency.
-
- 1.2 MHz
Sync Input HIGH
3.5 - - V
Sync Input LOW
- - 1.5 V
Minimum Sync. Input Pulse Duty Cycle
- 20 - %
OUTPUT
GATE Low Level
-
0.2 0.5
V
GATE High VSAT
Rise Time
C load = 1500pF
4.4 4.9 5.5
V
- 35 - ns
Fall Time
C load = 1500pF
- 40 - ns
NOTES:
10. Specifications at -40°C are guaranteed by design, not production tested.
11. This is the VCC current consumed when the device is active but not switching. Does not include gate drive current.
Typical Performance Curves
120
100
80
60
40
20
0 -40
-20 25
60
TEMPERATURE (°C)
85
FIGURE 1. FREQUENCY vs TEMPERATURE
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
-40
-20 25
60
TEMPERATURE (°C)
85
FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE
5 FN9007.8
October 21, 2015