SP6850 [SYNC-POWER]
Green-Mode PWM Controller; 绿色模式PWM控制器
| 型号： | SP6850 |
| 厂家： | 
SYNC POWER CROP. |
| 描述： | Green-Mode PWM Controller |
| 文件： | 总10页 (文件大小：258K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SP6850
Green-Mode PWM Controller
DESCRIPTION
APPLICATIONS
The SP6850 is the current mode PWM controller
with green-mode power-saving operation, to meet the
low standby-power needs of low-power SMPS. This
green-mode function enables the power supply to
easily meet even the strictest power conservation
requirements. The functions such as the leading-edge
blanking of the current sensing, internal slope
compensation and the small package provide the high
efficiency / low cost for SMPS power applications.
SP6850 is processed by BiCMOS fabrication, that
enables reducing the start-up current and the
operating current. SP6850 is available by SOT-23-6L
/ DIP-8P packages.
z
z
z
z
AC/DC Switching Power Adaptor
Battery Charger
PC 5V Standby Power.
Open-Frame Switching Power Supply
FEATURES
PIN CONFIGURATION
SOT-23-6L
z
High-Voltage BiCMOS Process
Very Low Startup Current (Typ ~ 8µA)
Under Voltage Lockout (UVLO )
Current Mode Control with Cycle Peak
Current Limiting
DIP-8P
z
z
z
z
z
z
z
z
z
z
z
Leading-Edge Blanking
Programmable Switching Frequency
Internal Slope Compensation
Green-Mode Control for Power Saving
Non-audible-noise Green Mode Control
300mA Driving Capability
OVP (Over Voltage Protection) on Vcc Pin
PART MARKING
SOT-23-6L
DIP-8P
2007/04/10 Ver.3
Page 1
SP6850
Green-Mode PWM Controller
TYPICALAPPLCATION CIRCUIT
TYPICALAPPLCATION CIRCUIT ( High Efficiency SMPS + Synchronous Rectifier )
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
PIN DESCRIPTION
SP6850D8TG
Pin
1
2
Symbol
OUT Gate driver output to drive the external MOSFET
VCC Supply Voltage in
Description
3
NC
Unconnected pin
Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin
also provides current amplitude information for current-mode control.
This current is used to charge an internal capacitor, to determine the switching frequency.
Unconnected pin
4
CS
5
6
RT
NC
Voltage feedback. The pin provides the output voltage regulation signal., it provides feedback
to the internal PWM comparator, so that the PWM comparator can control the duty cycle.
GND Ground
7
8
COMP
SP6850S26RG
Pin
1
Symbol
GND Ground
Description
Voltage feedback. The pin provides the output voltage regulation signal., it provides feedback
to the internal PWM comparator, so that the PWM comparator can control the duty cycle
This current is used to charge an internal capacitor, to determine the switching frequency.
Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin
also provides current amplitude information for current-mode control
2
3
4
COMP
RT
CS
5
6
VCC Supply Voltage in
OUT Gate driver output to drive the external MOSFET
BLOCK DIAGRAM
2007/04/10 Ver.3
Page 3
SP6850
Green-Mode PWM Controller
ORDERING INFORMATION
Part Number
Package
Part Marking
SP6850AD8TG
SP6850BD8TG
SP6850AS26RG
SP6850BS26RG
DIP-8P
DIP-8P
SOT-23-6L
SOT-23-6L
SP6850I
SP6850I
85AYW
850YW
※ SP6850AD8TG / SP6850BD8TG : Tube ; Pb – Free
※ SP6850AS26RG / SP6850BS26RG : Tape Reel ; Pb – Free
ABSOULTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified.)
The following ratings designate persistent limits beyond which damage to the device may occur.
Symbol
VCC
Parameter
Value
36
Unit
V
DC Supply Voltage
VCOMP / RT / CS COMP / RT / CS Voltage
-0.3 ~ 7.0
0.3
V
W
PD
Power Dissipation @ TA=85℃ (*)
Human Body Model
Machine Model
4
300
KV
V
ESD
Tope
TJ
TSTG
TLEAD
Operating Ambient Temperature
Operating Junction Temperature Range
Storage Temperature Range
-40 ~ 85
-40 ~ 150
-40 ~ 150
260
℃
℃
℃
℃
Pb-Free Lead Soldering Temperature for 5 sec.
SOT-23-6L
DIP-8P
210
95
RӨJC
Thermal Resistance Junction – Case (*)
℃/W
(*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions.
2007/04/10 Ver.3
Page 4
SP6850
Green-Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA=25℃, VCC=15V, unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
Supply Voltage ( Vcc Pin )
Istt
Iop
Startup
Operating Current
Current
8
2
10.0
16.0
20
4
11.0
17.0
36
uA
mA
V
V
V
VCOMP = 3V
UVLO (off) Min. Operating Voltage
UVLO (on ) Start Threshold Voltage
OVP Level Over Voltage Protection
Voltage Feedback ( Comp Pin )
9.0
15.0
28
Isc
Vop
Short Circuit Current
Open Loop Voltage
2.2
5.0
3.0
mA
V
VTH(GM) Green Mode Threshold VCOMP
2.35
V
Oscillator ( RT Pin )
FOSC
Frequency
RT=100KΩ
Fs=65.0KHz
60.0
65.0
20
75.0 KHz
KHz
FOSC(GM) Green Mode Frequency
Fdt
Fdv
Frequency Variation versus Temp. Deviation (-40°C ~105°C)
Frequency Variation versus VCC Deviation (VCC=11V-25V)
3
1
%
%
Current Sensing ( CS Pin )
SP6850BD8TG
SP6850BS26RG
SP6850AD8TG
SP6850AS26RG
0.8
0.7
0.85
0.75
0.9
0.8
Vcs(off) Maximum Input Voltage
V
KΩ
nS
Zcs
TPD
Input impedance
Delay to Output
50
150
Gate Driver Output ( OUT Pin )
DC (Max) Maximum Duty Cycle
DC (Min) Minimum Duty Cycle
70
8
75
0
80
1
%
%
VCC=15V,
Io=20mA
VCC=15V,
Io=20mA
VOL
V
V
Output Low Level
Output High Level
VOH
Tr
Tf
Load Cap=1000pF
Load Cap=1000pF
50
30
200
120
nS
nS
Rising Time
Falling Time
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.)
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.)
2007/04/10 Ver.3
Page 7
SP6850
Green-Mode PWM Controller
DIP- 8P PACKAGE OUTLINE
2007/04/10 Ver.3
Page 8
SP6850
Green-Mode PWM Controller
SOT-23-6L PACKAGE OUTLINE
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
Information provided is alleged to be exact and consistent. SYNC Power Corporation presumes no responsibility for the
penalties of use of such information or for any violation of patents or other rights of third parties that may result from its use.
No license is granted by allegation or otherwise under any patent or patent rights of SYNC Power Corporation. Conditions
mentioned in this publication are subject to change without notice. This publication surpasses and replaces all information
previously supplied. SYNC Power Corporation products are not authorized for use as critical components in life support
devices or systems without express written approval of SYNC Power Corporation.
©The SYNC Power logo is a registered trademark of SYNC Power Corporation
©2004 SYNC Power Corporation – Printed in Taiwan – All Rights Reserved
SYNC Power Corporation
9F-5, No.3-2, Park Street
NanKang District (NKSP), Taipei, Taiwan, 115, R.O.C
Phone: 886-2-2655-8178
Fax: 886-2-2655-8468
http://www.syncpower.com
2007/04/10 Ver.3
Page 10
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