CM6900GIS [CHAMP]
Resonant Controller; 谐振控制器
| 型号： | CM6900GIS |
| 厂家： | 
CHAMPION MICROELECTRONIC CORP. |
| 描述： | Resonant Controller |
| 文件： | 总12页 (文件大小：222K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CM6900G
Resonant Controller
GENERAL DESCRIPTION
FEATURES
CM6900G is resonant controller tailor for series z
topology with synchronous operation to achieve z
high efficiency to meet today’s power need. It is
Supply Voltage Range : 10V to 15V.
Typical Peak Drive from 12V supply : (PMOS~200 ohm
and NMOS~100 ohm).
used for DC-DC conversion in the offline
application. Light load regulation is accomplished
z
z
UVLO=13V with 3V Hystetesis.
Reference OK Comparator.
by transitioning the controller from frequency z
FM/PWM Mode Operation.
modulation mode into PWM mode.
z
z
Softstart Capability with Shutdown Function.
Latch or Auto-Restart during Current Limit or OVP.
APPLICATIONS
CM6900G Pin Configuration
z
z
z
z
z
DC-DC Power Supply.
LED Lighting Power Supply
Server Power
Industrial Power Supply
High Power Adaptor
ORDERING INFORMATION
Part Number
CM6900GIS
Temperature Range
Package
-40℃ to 125℃
16-Pin SOIC (S016)
*Note: G : Suffix for Pb Free Product
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 1
CM6900G
Resonant Controller
TYPICAL APPLCATION CIRCUIT
+VDC
HS2
HS
HS3
HS
D10 SCD14
Q12 CMT08N50
R43
10Ω
DRVH
C30
100pF/1KV
R44
47KΩ
24VSYNDRVL
Lp(2.5mH)
L4
C31
T4
CMT60N06
Q13
R45 47KΩ
2
DRVHGND
L5
13
+24V
200uh/RM8
68nF/630V
D11 SCD14
C32
0.8uH/10A
47nF/630V
Q14
CMT08N50
14
15
R46
10Ω
1
C35
+
C33
+
C34
C36
C47
24VSYNDRVH
DRVL
1000uF/35V
1000uF/35V
0.1uF/63V
0.1uF/63V 0.1uF/63V
CMT60N06
C37
100pF/1KV
R47 47KΩ
16
9
Q15
R49
47KΩ
ERL-35
L6
+12V
Q16
24VSYNDRVL
10
11
SI4856ADY
2uH/3A
C40
+
C38
+
C39
C41
1000uF/16V
1000uF/16V
0.1uF/63V
0.1uF/63V
12
Q17
D12
T5
3
IPLIMIT
1
2
SI4856ADY
24VSYNDRVH
BAV99
D13
C42
470nF/25V
R50
330Ω 1/4W
4
CT-UU-9.8
BAV99
+24V
+24V
CN2
CN3
+12V
5VSB
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
CN4
CN5
CN6
2
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
2
1
ENABLE
1
CN2.54-P6
CN2.54-P6
CN2.54-P10
CN2.54-P10
12VS
Q18
BC817
C44
+
C43
100uF/25V
T6
5
6
DRVH
2.2uF/63V
Q20
BC807
DRVHGND
3
2
12VS
+12V
+24V
+12V
12VS
7
8
DRVL
Q24
BC817
D14
R53
R54
6.8KΩ
15K
SCD12
EE19
Q25
R55
R56
BC807
U6
390Ω
620Ω
12VS
1
16
VREF
Rset
VREF
VCC
2
15
14
13
12
11
10
9
12VS
VFB
3
Q19
FEAO
PRIDRV
PRIDRVB
SRDRV
SRDRVB
GND
BC817
VREF
4
D_IN-
5
D_IN+
C50
R64
6.8KΩ
R51 4.7Ω 1/4W
6
24VSYNDRVH
DEAO
10nF/25V
7
12VS
SD
CSS
R73
Q22
BC807
C49
470pF/25VN
R70
100KΩ
8
R57
VREF
Ilim
RT/CT
C51
910Ω
39KΩ
C55
820pF/25VN
1uF/16V
CM6900
R63
R65
4.7KΩ
R66 R67
33KΩ NC
R68
NC
R69
240KΩ
R71
13KΩ
R72
C52
104pF
C53
0.1uF/25V
C54
C56
0.1uF/25V
12VS
150K
1KΩ
0.1uF/25V
Q21
BC817
IPLIMIT
R52 4.7Ω 1/4W
24VSYNDRVL
Q23
BC807
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 2
CM6900G
Resonant Controller
PIN DESCRIPTION
Pin
Operating Voltage
Symbol
No.
Description
Typ.
Min.
Max. Unit
External resistor which convert FEAO voltage signal into current
signal for frequency modulation.
0
5.5
V
1
RSET
0
0
2.5
3
V
V
2
3
VFB
Non-inverting input into resonant error amplifier and OVP input.
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
17.5
V
V
V
PRIDRV
PRIDRVB
VCC
15
16
Buffered output for the 7.5V voltage reference
7.5
V
VREF
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 3
CM6900G
Resonant Controller
BLOCK DIAGRAM
FEAO
VCC
UVLO/REF
VREF
GND
VFB
2.5V
+
V To I
-
-
RSET
D_IN-
+
-
-
OVP
1.25V
2.9V
+
D_IN+
DEAO
+
+
PRIDRV
VCC
PRIDRVB
-
Logic
SRDRV
CSS
+
SHDN
SRDRVB
ILIM
1V
-
+
ILim
CLK
1V
-
OSC
RT CT
ABSOULTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified.)
The following ratings designate persistent limits beyond which damage to the device may occur.
Value
Symbol
VCC
Parameter
Unit
V
DC Supply Voltage
SRDRV Voltage
SRDRVB Voltage
PRIDRV Voltage
PRIDRVB Voltage
VREF Voltage
-0.3 to 20
SRDRV
SRDRVB
PRIDRV
PRIDRVB
VREF
-0.3 to VCC+0.3
-0.3 to VCC+0.3
-0.3 to VCC+0.3
-0.3 to VCC+0.3
-0.3 to 7.5
V
V
V
V
V
RTCT
RTCT Voltage
-0.3 to VREF+0.3
-0.3 to VREF+0.3
-0.3 to VREF+0.3
-0.3 to VREF+0.3
-0.3 to VREF+0.3
-0.3 to VREF+0.3
-0.3 to VREF+0.3
-0.3 to VREF+0.3
V
VILIM
VILIM Voltage
V
CSS
CSS Voltage
V
DEAO
D_IN+
FEAO
VFB
PWM Error Amplifier Output Voltage
V
Non-Inverting Input Into PWM Error Amplifier Voltage
Resonant Error Amplifier Output Voltage
Non-Inverting Input Into Resonant Error Amplifier Voltage
V to I Voltage
V
V
V
RSET
V
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 4
CM6900G
Resonant Controller
ELECTRICAL CHARACTERISTICS
(VCC=12V, RTCT Freq. =100 KHz, Duty Cycle=50% , Temp=25 degree C, unless otherwise specified.)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
VREF (pin 16)
Reference Voltage
Line Regulation
VREF
TA=25’C; Iref=1mA
11V < Vcc < 16.5V
0mA < Iref < 7.5mA
7.4
7.5
10
10
7.6
25
25
V
mV
mV
Load Regulation
VCC (pin 15)
VCC Start up voltage
UVLO Hysteresics
Operating Current
Vstart
Hyst
ICC
12.5
13
3
13.5
3.5
V
V
1
mA
PRIDRV,PRIDRVB,SRDRV,SRDRVB (pin 11,12,13 and 14)
Output Low Voltage
Output High Voltage
Iout peak source current
Iout peak sink current
PMOS Rdson
Vol
Voh
Iout
Isrdrv=-6mA
Isrdrv=+6mA
0.6
10.8
0.12
0.12
200.0
100.0
1.2
V
V
9.6
A
Iout
A
Rout
Rout
250.0
150.0
Ohm
Ohm
NMOS Rdson
Dead Time between
PRIDRV and PRIDRVB
Rising Edge Delay Between
PRIDRV and SRDRV
Falling Edge Delay Between
SRDRV and PRIDRV
TDead
Tdelay
Tdelay
400
500
500
ns
ns
ns
%
Duty Cycle Range
0
50
ILIM (pin 8)
Threshold Voltage
CSS (pin 7)
Vth
0.9
1
1.1
V
Soft Start Current
Enable Voltage
Enable Hysteresis
Auto-restart Upper
Threshold
Iss
Ven
7.5
1.0
75
uA
V
0.9
1.1
Vhyst
mV
Vup
Vlw
4.85
5.0
5.15
V
V
Auto-restart Lower
Threshold
1-Vhyst
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 5
CM6900G
Resonant Controller
ELECTRICAL CHARACTERISTICS
(VCC=12V, RTCT Freq. =100 KHz, Duty Cycle=50% , Temp=25 degree C, unless otherwise specified.)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
FEAO Resonant Error Amplifier (pin 3)
Input Voltage Range
6
V
umho
V
Transconductance
Feedback Reference Voltage
Input Bias Current
Output High Voltage
Output Low Voltage
Sink Current
Gm
135
2.5
2.45
-1
2.55
-0.5
5.5+VBE
0.1
uA
V
0.4
V
-15
uA
uA
dB
Source Current
15
Open Loop Gain
60
DEAO PWM Error Amplifier (pin 6)
Input Voltage Range
6
V
umho
uA
V
Transconductance
Gm
135
-0.5
3+VBE
0.1
Input Bias Current
-1.0
Output Voltage High
Output Voltage Low
Sink Current
0.4
V
-15
uA
uA
dB
Source Current
15
Open Loop Gain
60
RTCT Oscillator;RT=61K;CT=470pF (pin 8)
Initial Accuracy
TA=25’C
95
100
1
105
Khz
%
Volatge Stability
11V < Vcc < 16.5V
Temperature Stability
Ramp Valley to Peak Voltage
CT Discharge Time
Maxmum Duty cycle
Minimum Duty Cycle
VFB OVP Comparator
Threshold Voltage
2
%
2
V
350
50
0
nS
%
DEAO > 3.0V
DEAO < 1.2V
%
2.94
17.5
V
V
VCC OVP Comparator
Input Voltage Range
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 6
CM6900G
Resonant Controller
Timing Diagram
Dead Time
PRIDRVB
PRIDRV
Delay Time
Delay Time
SRDRVB
SRDRV
Oscillator
The oscillator frequency is determined by the values of RT and CT.
fosc = 1 / (tRAMP + t DEADTIME)
tRAMP = RT * CT * ln((VREF + ICHG*RT -1.25)/(VREF + ICHG*RT -3)) where ICHG = 4*(FEAO-VBE)/RSET
tDEADTIME = 2.125V/2.5mA * CT = 850 * CT
Resonant Section
FM Modulator
Frequency modulation of the resonant controller section is accomplished by controlling the charging current of the
oscillator through resonant error amplifier. The frequency of the resonant section is ½ of the oscillator frequency.
Compensation is accomplished by connecting R and C in series to the FEAO pin.
ICHG = 4*(FEAO-VBE)/RSET
ICHG(max) = 20V/RSET
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 7
CM6900G
Resonant Controller
Vref
RT
+
-
VFB
2.5V
V To I
OSC
CT
RSET
PWM Section
Pulse Width Modulator
PWM control is used in voltage mode. In Applicaton1, when FEAO is equal to the external reference voltage at
D_IN+ due to light load, the frequency of the oscillator is fixed at a value determined by the voltage at FEAO, and
the controller enters into PWM mode. In this mode, both frequency modulator and pulse width modulator are active.
In Application 2 ,the offset voltage Vos is externally generated between the VFB pin and D_IN- through a resistor
network Rf1, Rf2 and Rf3 in order to separate the interaction between FM mode and PWM mode.
Vos = 2.5V×Rf2/Rf3
When the output load is reduced to a point where FEAO is railed to its maximum value of 5V+ VBE, the frequency is
fixed at a value determined by 5V+VBE. Further reduction in load will cause the controller to go into PWM mode
when the voltage at the VFB pin is 2.5V+Vos. During this light load operation, FM error amplifier is in open-loop
mode while PWM is in closed-loop mode. Compensation is accomplished by connecting R and C in series to the
DEAO pin.
In Application 3 , low gain configuration accomplished by connecting Rf4 and Rf5 in the closed loop
configuration . The gain for the PWM is determined by Rf4 and Rf5 where the gain is equal to -Rf5/Rf4. The voltage
of VRset at which the controller goes into FM and PWM simultaneously is equal to :
VRset = D_IN+ × (1+Rf4/Rf5) - (Rf4/Rf5) × 3 where 3 is the peak voltage of RTCT
Varyin Rset from VRset to VRset + 1.75 × Rf4/Rf5 will cause the duty cycle to vary from 50% to 0% while the
frequency will vary propotionally according to 1.75*Rf4/Rf5 where 1.75 is the peak-to-peak voltage of the RTCT
ramp. For proper operation, select Rf5 value so that the current through Rf5 {((D_IN+) - 1.2)/Rf5} should be less
than 5uA.
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 8
CM6900G
Resonant Controller
Vout
Vout
Vref
Application 2
Vref
Application 1
Rf1
Rf3
Rf1
Rf2
RT
RT
VFB
VFB
+
-
+
-
FEAO
FEAO
V To I
OSC
V To I
OSC
2.5V
2.5V
CT
CT
RSET
RSET
Vref
-
D_IN-
+
DEAO
D_IN+
DEAO
-
-
D_IN+
+
PWM
D_IN-
PWM
-
+
+
Rf3
RT CT
RT CT
Vout
Application 3
Vref
Rf1
Rf3
RT
VFB
2.5V
+
-
FEAO
V To I
OSC
CT
RSET
Rf4
Vref
Rf5
-
D_IN-
DEAO
-
+
PWM
D_IN+
+
RT CT
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 9
CM6900G
Resonant Controller
Soft Start and Enable
Soft start of the FM and PWM is controlled by the selection of the external capacitor at CSS pin. A current source
of 8uA supplies the charging current for the capacitor. Soft start of the FM and PWM begins at 1.25V. The soft start
pin CSS also serves as an enable function. The output drivers are enabled when CSS pin reached 1V.
Auto-retry Mode
During normal operation, CSS pin will be charged to 5.5V + VBE. When VFB exceeds 2.93V due to OVP or ILIM
exceeds 1V due to over current condition, output drivers are immediate set to low , and CSS begins to discharge
with 3.3uA current source. When CSS pin is below 0.9V, 8uA current source start charging the CSS pin. When
CSS pin reaches 1V, the output drivers are re-enable and the controller goes into soft start mode. If OVP or over
current condition still exists then, the outputs are immediately disabled, but CSS continues to charge toward 5V.
When CSS reaches 5V, 8uA charging current is disabled and 3.3uA current source begins to discharge the CSS,
and the cycle repeat until OVP or over current condition is removed.
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 10
CM6900G
Resonant Controller
PACKAGE DIMENSION
16-PIN PSOP (PS16)
θ
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 11
CM6900G
Resonant Controller
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated
circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify,
before placing orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or
environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for
use in life-support applications, devices or systems or other critical applications. Use of CMC products in such applications is
understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the
customer should provide adequate design and operating safeguards.
CMC assumes to no liability to customer product design or application support. CMC warrants the performance of its products to
the specifications applicable at the time of sale.
HsinChu Headquarter
5F, No. 11, Park Avenue II,
Science-Based Industrial Park,
HsinChu City, Taiwan
Sales & Marketing
7F-6, No.32, Sec. 1, Chenggong Rd.,
Nangang District, Taipei City 115,
Taiwan, R.O.C.
TEL: +886-3-5679979
TEL: +886-2-2788 0558
FAX: +886-2-2788 2985
FAX: +886-3-5679909
2007/11/22 Rev1.0
Champion Microelectronic Corporation
Page 12
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