Datasheet SP6853D8TG, SP6853S26RG Datasheet (SYNC Power) [ru]

SP6853

Green-Mode PWM Controller

DESCRIPTION

The SP6853 is a low cost , low startup current ,
current mode PWM controller with green-mode
power-saving operation. The integrated functions
include the leading-edge blanking of the current
sensing, internal slope compensation. It would
provide the users a superior AC/DC power
application of higher efficiency, low external
component counts, and lower cost solution for
applications.
The SP6853 features more protections or functions
for the following characteristics :
※Add OLP (Over Load Protection) function to

provide better protection performance for fault
conditions like short circuit or over load.
※Modify the OVP (Over Voltage Protection)

mechanism from the cycle-by-cycle mode to the
hiccup mode.

SP6853 is available by SOT-23-6L / DIP-8P
packages.

APPLICATIONS

z AC/DC Switching Power Adaptor
z Battery Charger
z PC 5V Standby Power.
z Open-Frame Switching Power Supply

FEATURES

z High-Voltage BiCMOS Process
z Very Low Startup Current (<20µA)
z Under Voltage Lockout (UVLO )
z Current Mode Control
z Non-audible-noise Green Mode Control
z Current Limiting
z LEB (Leading-Edge Blanking) on CS Pin
z OLP (Over Load Protection)
z OVP (Over Voltage Protection) on Vcc Pin
z Leading-Edge Blanking
z Programmable Switching Frequency
z Internal Slope Compensation
z Green-Mode Control for Power Saving
z 300mA Driving Capability

z

PIN CONFIGURATION

SOT-23-6L DIP-8P

PART MARKING

SOT-23-6L DIP-8P

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SP6853

Green-Mode PWM Controller

TYPICAL APPLCATION CIRCUIT

TYPICAL APPLCATION CIRCUIT ( High Efficiency SMPS + Synchronous Rectifier )

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SP6853

Green-Mode PWM Controller

PIN DESCRIPTION
SP6853D8TG

Pin Symbol Description

1 OUT Gate driver output to drive the external MOSFET
2 VCC Supply Voltage in
3 NC Unconnected pin

4 CS

5 RT This current is used to charge an internal capacitor, to determine the switching frequency.
6 NC Unconnected pin

7 COMP

8 GND Ground

SP6853S26RG

Pin Symbol Description

1 GND Ground

2 COMP

3 RT This current is used to charge an internal capacitor, to determine the switching frequency.

4 CS

5 VCC Supply Voltage in
6 OUT Gate driver output to drive the external MOSFET

BLOCK DIAGRAM

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.

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.

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

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

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SP6853

Green-Mode PWM Controller

ORDERING INFORMATION

Part Number Package Part Marking

SP6853D8TGB DIP-8P SP6853I

SP6853S26RGB SOT-23-6L 853YW

※ SP6853D8TG : Tube ; Pb – Free ; Halogen-Free

※ SP6853S26RG

ABSOULTE MAXIMUM RATINGS

The following ratings designate persistent limits beyond which damage to the device may occur

Symbol Parameter Value Unit

VCC DC Supply Voltage 36 V

V

COMP / RT / CS

PD Power Dissipation @ TA=85 (*)℃ 0.3 W

ESD

T

Operating Ambient Temperature -40 ~ 85 ℃

ope

TJ Operating Junction Temperature Range -40 ~ 150 ℃

T

Storage Temperature Range -40 ~ 150 ℃

STG

T

Pb-Free Lead Soldering Temperature for 5 sec. 260 ℃

LEAD

R

Thermal Resistance Junction – Case (*)

ӨJC

(*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions.

: Tape Reel ; Pb – Free ; Halogen-Free

(T

=25 , unless otherwise specified.)℃

A

.

COMP / RT / CS Voltage -0.3 ~ 7.0 V

Human Body Model 4 KV
Machine Model 300 V

SOT-23-6L 210
DIP-8P 95

/W℃

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SP6853

Green-Mode PWM Controller

ELECTRICAL CHARACTERISTICS

(TA=25 , V℃

Symbol Parameter Conditions Min. Typ. Max. Unit

Supply Voltage ( Vcc Pin )

Istt Startup Current 10 20 uA

Iop Operating Current

UVLO (off) Min. Operating Voltage 9.0 10.0 11.0 V
UVLO (on ) Start Threshold Voltage 15.0 16.0 17.0 V

OVP Level Over Voltage Protection 24 26 29.5 V

Voltage Feedback ( Comp Pin )

Isc Short Circuit Current 1.25 2.2 mA

Vop Open Loop Voltage 6 V

VTH(GM) Green Mode Threshold VCOMP 2.35 V

Oscillator ( RT Pin )

FOSC Frequency RT=100KΩ 60.0 68.0 75.0 KHz

FOSC(GM) Green Mode Frequency Fs=65.0KHz 22 KHz

Fdt Frequency Variation versus Temp. Deviation (-40°C ~105°C) 3 %

Fdv Frequency Variation versus VCC Deviation (VCC=11V-25V) 1 %

Current Sensing ( CS Pin )

Vcs(off) Maximum Input Voltage 0.8 0.85 0.9 V

TLEDD

Zcs Input impedance 1

TPD Delay to Output 100 nS

Gate Driver Output ( OUT Pin )

DC (Max) Maximum Duty Cycle 70 75 80 %
DC (Min) Minimum Duty Cycle 0 %

VOL

VOH

Tr
Tf

OLP ( Over Load Protection )

TLOLP

TDOLP

Note: The OLP delay time is proportional to the period of switching cycle. So that, the lower RT value will set the higher

=15V, unless otherwise specified.)

CC

Leading Edge Blanking Time

Output Low Level

Output High Level

Rising Time
Falling Time

OLP Trip Level
OLP Delay Time (note)

VCOMP = 0V 2.7 4 mA
VCOMP = 3V 2.4 mA

Protection tripped
(OLP, OVP)

280 nS

VCC=15V,
Io=20mA
VCC=15V,
Io=20mA
Load Cap=1000pF 50 200 nS

Load Cap=1000pF 30 120 nS

5.0 V
60 mS

1.0 mA

MΩ

1 V

8 V

switching frequency and the shorter OLP delay time.

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SP6853

Green-Mode PWM Controller

PERFORMANCE CHARACTERISTICS (T

=25 , unless otherwise specified.)℃

A

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SP6853

Green-Mode PWM Controller

PERFORMANCE CHARACTERISTICS (T

=25 , unless otherwise specified.)℃

A

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SP6853

Green-Mode PWM Controller

PERFORMANCE CHARACTERISTICS (T

=25 , unless otherwise specified.)℃

A

Max Duty Cycle

Max Duty Cycle

Min Duty Cycle

Min Duty Cycle

Max Duty Cycle

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Min Duty Cycle

SP6853

Green-Mode PWM Controller

PERFORMANCE CHARACTERISTICS (T

=25 , unless otherwise specified.)℃

A

Rising Time Load

Rising Time Load

Falling Time Load

Falling Time Load

Rising Time Load

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Falling Time Load

SP6853

Green-Mode PWM Controller

PERFORMANCE CHARACTERISTICS (T

=25 , unless otherwise specified.)℃

A

Leading Edge Blanking Time

Leading Edge Blanking Time

OLP Delay Time

OLP Delay Time

Leading Edge Blanking Time

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OLP Delay Time

SP6853

Green-Mode PWM Controller

DIP- 8P PACKAGE OUTLINE

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SP6853

Green-Mode PWM Controller

SOT-23-6L PACKAGE OUTLINE

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SP6853

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

7F-2, No.3-1, Park Street

NanKang District (NKSP), Taipei, Taiwan, 115, R.O.C

Phone: [phone]

Fax: [phone]

http://www.syncpower.com

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