LLC Current-Resonant Off-Line Switching Controller
SSC3S910
Data Sheet
Description
Package
The SSC3S910 is a controller with SMZ* method for
LLC current resonant switching power supplies,
SOP18
incorporating a floating drive circuit for a high-side
power MOSFET. The IC includes useful functions such
as the Standby Function, the Overload Protection with
input voltage compensation, the Automatic Dead Time
Adjustment, and the Capacitive Mode Detection.
The IC achieves high efficiency, low noise and high
cost-performance power supply systems with few
external components.
*SMZ: Soft-switched Multi-resonant Zero Current
switch, achieved soft switching operation during all
switching periods.
Not to scale
Features
● Standby Mode Change Function
▫ Output Power at Light Load: PO = 125 mW
Applications
(PIN = 0.27 W, as a reference with discharge resistor
of 1MΩ for across the line capacitor)
▫ Burst operation in standby mode
▫ Soft-on/Soft-off function: reduces audible noise
● Realizing power supply with universal mains input
voltage
● Soft-start Function
● Capacitive Mode Detection Function
● Reset Detection Function
Switching power supplies for electronic devices such as:
● Digital appliances: LCD television and so forth
● Office automation (OA) equipment: server, multi-
function printer, and so forth
● Industrial apparatus
● Communication facilities
● Automatic Dead Time Adjustment Function
● Built-in Startup Circuit
● Input Electrolytic Capacitor Discharge Function
● Protections
▫ Brown-In and Brown-Out Function: Auto-restart
▫ High-side Driver UVLO: Auto-restart
▫ Overcurrent Protection (OCP): Auto-restart, peak
drain current detection, 2-step detection
▫ Overload Protection (OLP) with Input Voltage
Compensation: Auto-restart
▫ Overvoltage Protection (OVP): Auto-restart
▫ Thermal Shutdown (TSD): Auto-restart
Typical Application
VOUT1(+)
U1
VSEN
VCC
FB
ST
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
NC
VGH
VS
NF
VOUT(-)
CSS
CL
VB
NC
RC
REG
VGL
GND
VOUT2(+)
VAC
PL
SB
PC2
Standby
PC2
TC_SSC3S910_1_R3
SSC3S910 - DSJ Rev.2.1
Oct. 03, 2023
SANKEN ELECTRIC CO., LTD.
https://www.sanken-ele.co.jp/en/
1
© SANKEN ELECTRIC CO., LTD. 2014