LCS700-708
HiperLCS
™
Family
Integrated LLC Controller, High-Voltage
Power MOSFETs and Drivers
Product Highlights
Features
•
LLC half-bridge power stage incorporating controller, high and
low-side gate drives, and high-voltage power MOSFETs
•
Eliminates up to 30 external components
•
High maximum operating frequency of 1 MHz
•
Nominal steady-state operation up to 500 kHz
•
Dramatically reduces magnetics size and allows use of
SMD ceramic output capacitors
•
Precise duty symmetry balances output rectifier current,
improving efficiency
•
50% ±0.3% typical at 300 kHz
•
Comprehensive fault handling and current limiting
•
Programmable brown-in/out thresholds and hysteresis
•
Undervoltage (UV) and overvoltage (OV) protection
•
Programmable over-current protection (OCP)
•
Short-circuit protection (SCP)
•
Over-temperature protection (OTP)
•
Programmable dead-time for optimized design
•
Programmable burst mode maintains regulation at no-load and
improves light load efficiency
•
Programmable soft-start time and delay before soft-start
•
Accurate programmable minimum and maximum frequency
limits
•
Single package designed for high-power and high-frequency
•
Reduces assembly cost and reduces PCB layout loop areas
•
Simple single clip attachment to heat sink
•
Exposed thermal pad connected to ground potential – no
insulators required between package and heat sink
•
Staggered pin arrangement for simple PC board routing
and high-voltage creepage requirements
•
Paired with HiperPFS PFC product gives complete, high
efficiency, low part count PSU solutions
Applications
•
High-efficiency power supplies (80 PLUS Silver, Gold and
Platinum)
•
LCD TV power supplies
•
LED street and area lighting
•
Printer power supplies
•
Audio amplifier
Description
The HiperLCS is an integrated LLC power stage incorporating a
multi-function controller, high-side and low-side gate drivers,
plus two power MOSFETs in a half-bridge configuration. Figure
1 shows a simplified schematic of a HiperLCS based power stage
where the LLC resonant inductor is integrated into the transformer.
The variable frequency controller provides high efficiency by
switching the power MOSFETs at zero voltage (ZVS), eliminating
switching losses.
B+
VCCH
D
Standby
Supply
VCC
CONTROL
HB
+V
HV DC
Input
OV/UV
VREF
R
FMAX
DT/BF
IS
RTN
R
BURST
FB
G
S1/S2
HiperLCS
B-
LLC Feedback Circuit
PI-6159-060211
Figure 1.
Typical Application Circuit – LCD TV and PC Main Power Supply.
Output Power Table
Product
LCS700HG
LCS701HG
LCS702HG
LCS703HG
LCS705HG
LCS708HG
Maximum Practical Power
1
110 W
170 W
220 W
275 W
350 W
440 W
Table 1. Output Power Table.
Notes:
1. Maximum practical power is the power the part can deliver when properly
mounted to a heat sink and a maximum heat sink temperature of 90 °C.
www.powerint.com
June 2011
POWERINT [ POWER INTEGRATIONS, INC. ]
