CM6901
SLS (SRC/LLC+SR) Controller with 1 FM+2 PWMs
PIN DESCRIPTION
Operating Voltage
Description
Pin No.
Symbol
Typ.
Min.
Max. Unit
External resistor which convert FEAO voltage signal into current
signal for frequency modulation. SR is PWMing Control , when
RSET lower than 1.5V.
0
5.5
V
1
RSET
0
0
2.5
3
V
V
2
3
VFB
Non-inverting input into resonant error amplifier .
Resonant error amplifier output and compensation node for
frequency modulation control.
5.5
FEAO
0
6
V
D_IN-
D_IN+
4
5
Inverting input into PWM error amplifier.
0
0
6
V
V
Non-inverting input into PWM error amplifier.
PWM error amplifier output and compensation node for PWM
control.
4.5
6
7
DEAO
CSS
Soft start for FM/PWM operation with 1V enable threshold. Also,
use for auto-restart operation during current limit.
0
5.5
V
8
9
Input to current comparator with 1V threshold.
0
1
1.25
3
V
V
ILIM
1.2
RTCT
Oscillator timing components which set the minimum frequency.
10
Ground
GND
11
12
Synchronous MOSFET driver output.
Synchronous MOSFET driver output.
-0.3
-0.3
VCC
VCC
V
V
SDRVB
SDRV
13
14
15
Primary side MOSFET driver output.
Primary side MOSFET driver output.
Positive supply for the IC
-0.3
-0.3
10
VCC
VCC
20
V
V
V
PRIDRVB
PRIDRV
VCC
15
16
Buffered output for the 7.5V voltage reference
7.5
V
VREF
2009/11/02 Rev1.4
Champion Microelectronic Corporation
Page 3
CHAMP [ CHAMPION MICROELECTRONIC CORP. ]
