1
Power Factor Correction Controllers
ISL6730A, ISL6730B, ISL6730C, ISL6730D
The ISL6730A, ISL6730B, ISL6730C, ISL6730D are active
Power Factor Correction (PFC) controller ICs that use a boost
topology. The controllers are suitable for AC/DC power
systems, up to 2kW and over the universal line input.
The ISL6730A, ISL6730B, ISL6730C, ISL6730D operate in
Continuous Conduction Mode (CCM). Accurate input current
shaping is achieved with a current error amplifier. A patent
pending breakthrough negative capacitance technology
minimizes zero crossing distortion and reduces the magnetic
components size. The small external components result in a
low cost design without sacrificing performance.
The internally clamped 12.5V gate driver delivers 1.5A peak
current to the external power MOSFET. The ISL6730A,
ISL6730B, ISL6730C, ISL6730D provide a highly reliable
system that is fully protected. Protection features include
cycle-by-cycle overcurrent, over power limit, over-temperature,
input brownout, output overvoltage and undervoltage
protection.
The ISL6730A, ISL6730B provide excellent power efficiency
and transitions into a power saving skip mode during light load
conditions, thus improving efficiency automatically. The
ISL6730A, ISL6730B, ISL6730C, ISL6730D can be shut down
by pulling the FB pin below 0.5V or grounding the BO pin. The
ISL6730C, ISL6730D have no skip mode.
Two switching frequency options are provided. The ISL6730B,
ISL6730D switch at 62kHz, and the ISL6730A, ISL6730C
switch at 124kHz.
Features
• Reduce component size requirements
- Enables smaller, thinner AC/DC adapters
- Choke and cap size can be reduced
- Lower cost of materials
• Excellent power factor over line and load regulation
- Internal current compensation
- CCM Mode with Patent pending IP for smaller EMI filter
•Better light load efficiency
- Automatic pulse skipping
- Programmable or automatic shutdown
• High reliable design
- Cycle-by-cycle current limit
- Input average power limit
- OVP and OTP protection
- Input brownout protection
• Small 10 Ld MSOP package
Applications
• Desktop computer AC/DC adaptor
• Laptop computer AC/DC adaptor
•TV AC/DC power supply
•AC/DC brick converters
FIGURE 1. TYPICAL APPLICATION FIGURE 2. PFC EFFICIENCY
+
ISL6730
VCC
ISEN
ICOMP
VIN
GATE
GND
FB
BO VREG
COMP
V
LINE
V
OUT
V
I
OUTPUT POWER (W)
EFFICIENCY (%)
ISL6730C
ISL6730A, SKIP
100
95
60
65
70
90
85
80
75
0 20 40 60 80 100
TABLE 1. KEY DIFFERENCES IN FAMILY OF ISL6730
VERSION ISL6730A ISL6730B ISL6730C ISL6730D
Switching Frequency 124kHz 62kHz 124kHz 62kHz
Skip Mode Yes-Fixed Yes-Fixed No No
August 8, 2013
FN8258.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas LLC 2013. 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.
