LD7530LD7530A
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z Very Low Startup Current (<20µA) z Current Mode Control z Non-audible-noise Green Mode Control z UVLO (Under Voltage Lockout) z LEB (Leading-Edge Blanking) on CS Pin z Programmable Modulating Frequency for Trembling z Internal Slope Compensation z OVP (Over Voltage Protection) on Vcc Pin z OLP (Over Load Protection) z 300mA Driving Capability
Shipping 3000 /tape & reel 3600 /tube /Carton 3000 /tape & reel 3600 /tube /Carton
2
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
LD7530/LD7530A
LD7530/LD7530A
Electrical Characteristics
(TA = +25oC unless otherwise stated, VCC=15.0V)
PARAMETER
CONDITIONS
Supply Voltage (Vcc Pin)
Startup Current
Operating Current (with 1nF load on OUT pin)
YY, Y : Year code (D: 2004, E: 2005…..) WW, W: Week code P : LD75..
(Product family code) ## : Production code
OUT VCC
NC CS
Ordering Information
Part number
VCOMP=0V COMP pin open
Green Mode Threshold VCOMP
Current Sensing (CS Pin)
Maximum Input Voltage, Vcs(off)
Leading Edge Blanking Time
Input impedance
Delay to Output
LD7530/LD7530A
Pin Configuration (LD7530)
DIP-8 (TOP VIEW)
SOT-26 (TOP VIEW)
GND COM P NC CT
8 765
TOP MARK YYWW##
OUT VCC CS
6
5
4
Y WP 30
1
2
3
OUT VCC
NC CS
1 234
GND COMP CT
Furthermore, the frequency trembling function is to reduce the noise level and thus helps the power circuit designers to easily deal with the EMI filter design by using minimum component cost and developing time.
& Vref
OVP Comparator
CT
Trembling
PG
OSC
OLP
Vref OK
OVP
28.0V(LD7530)
Delay
21.0V(LD7530A)
65KHz OSC
Protection
Driver Stage
OUT
Green-Mode Control
COMP CS
2R
R
∑+
Leading Edge
Absolute Maximum Ratings
Supply Voltage VCC COMP, CT, CS Junction Temperature Operating Ambient Temperature Storage Temperature Range Package Thermal Resistance (SOT-26) Package Thermal Resistance (DIP-8) Power Dissipation (SOT-26, at Ambient Temperature = 85°C) Power Dissipation (DIP-8, at Ambient Temperature = 85°C) Lead temperature (Soldering, 10sec) ESD Voltage Protection, Human Body Model ESD Voltage Protection, Machine Model Gate Output Current
And to satisfy different designs, 2 versions of OVP levels are implemented as ---
z LD7530 --- 28.0V ± 1.2V.
z LD7530A --- 21.0V ± 1.2V.
Features
z High-Voltage CMOS Process with Excellent ESD protection
Oscillator for Switching Frequency
Frequency
Green Mode Frequency
Trembling Frequency
Temp. Stability
(-40°C ~105°C)
Voltage Stability
(VCC=11V-25V)
Pin Configuration (LD7530A)
DIP-8 (TOP VIEW)
SOT-26 (TOP VIEW)
GND COM P NC CT
8 765
TOP MARK YYWW##
OUT VCC CS
6
5
4
Y WP 30A
1
2
3
1 234
GND COMP CT
Y The PB free package is identified in embossed font
Recommended Operating Conditions
Item
Min.
Max.
Unit
Supply Voltage Vcc (LD7530)
11
25
V
Supply Voltage Vcc (LD7530A)
11
18
V
CT Value
0.047
0.1
µF
5
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
Pin Descriptions
PIN (SOT-26)
1 2
3
4 5 6
PIN (DIP-8)
8 7
5
4 2 1
NAME
ຫໍສະໝຸດ Baidu
FUNCTION
GND Ground Voltage feedback pin (same as the COMP pin in UC384X), By connecting
COMP a photo-coupler to close the control loop and achieve the regulation. This pin is to program the frequency of the low frequency timer. By
Package
TOP MARK
LD7530 PL
SOT-26
YWP/30
LD7530 PN
DIP-8
LD7530PN
LD7530A PL
SOT-26
YWP/30A
LD7530A PN
DIP-8
LD7530APN
Note: The LD7530 and LD7530A are ROHS compliant.
VCOMP=0V VCOMP=3V Protection tripped (OLP, OVP)
UVLO (off)
UVLO (on)
OVP Level
LD7530 LD7530A
Voltage Feedback (Comp Pin)
Short Circuit Current Open Loop Voltage
Blanking
+ 0.85V
PWM Comparator
Slope Compensation
OCP Comparator
5.0V
OLP Delay Counter
OVP OLP
OLP
Comparator
PG
OLP Delay
SQ R
Protection
SQ R
GND
4
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
CT connecting a capacitor to ground to set the frequency of trembling and OLP delay time.
CS Current sense pin, connect to sense the MOSFET current VCC Supply voltage pin OUT Gate drive output to drive the external MOSFET
Applications
z Switching AC/DC Adaptor and Battery Charger z Open Frame Switching Power Supply
Typical Application
1
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
Y The PB free package is identified in embossed font
YY, Y : Year code (D: 2004, E: 2005…..) WW, W: Week code P : LD75..
(Product family code) ## : Production code
LD7530/LD7530A
5/18/2007
Green-Mode PWM Controller with Frequency Trembling and Integrated Protections
REV: 02a
General Description
The LD7530/LD7530A are specifically designed for the low total system cost by integrating many functions, protections, and the EMI-improved solution in a tiny SOT-26 package which usually need a lot of extra components or circuits on the general designs.
LD7530/LD7530A
30V -0.3 ~7V 150°C -40°C to 85°C -65°C to 150°C 250°C/W 100°C/W 250mW 650mW 260°C 2.5 KV 250 V 300mA
Caution: Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
3
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
Block Diagram
LD7530/LD7530A
VCC
32V
UVLO Comparator
All
internal bias Blocks
16.0V/ 10.0V
VCC OK
Shipping 3000 /tape & reel 3600 /tube /Carton 3000 /tape & reel 3600 /tube /Carton
2
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
LD7530/LD7530A
LD7530/LD7530A
Electrical Characteristics
(TA = +25oC unless otherwise stated, VCC=15.0V)
PARAMETER
CONDITIONS
Supply Voltage (Vcc Pin)
Startup Current
Operating Current (with 1nF load on OUT pin)
YY, Y : Year code (D: 2004, E: 2005…..) WW, W: Week code P : LD75..
(Product family code) ## : Production code
OUT VCC
NC CS
Ordering Information
Part number
VCOMP=0V COMP pin open
Green Mode Threshold VCOMP
Current Sensing (CS Pin)
Maximum Input Voltage, Vcs(off)
Leading Edge Blanking Time
Input impedance
Delay to Output
LD7530/LD7530A
Pin Configuration (LD7530)
DIP-8 (TOP VIEW)
SOT-26 (TOP VIEW)
GND COM P NC CT
8 765
TOP MARK YYWW##
OUT VCC CS
6
5
4
Y WP 30
1
2
3
OUT VCC
NC CS
1 234
GND COMP CT
Furthermore, the frequency trembling function is to reduce the noise level and thus helps the power circuit designers to easily deal with the EMI filter design by using minimum component cost and developing time.
& Vref
OVP Comparator
CT
Trembling
PG
OSC
OLP
Vref OK
OVP
28.0V(LD7530)
Delay
21.0V(LD7530A)
65KHz OSC
Protection
Driver Stage
OUT
Green-Mode Control
COMP CS
2R
R
∑+
Leading Edge
Absolute Maximum Ratings
Supply Voltage VCC COMP, CT, CS Junction Temperature Operating Ambient Temperature Storage Temperature Range Package Thermal Resistance (SOT-26) Package Thermal Resistance (DIP-8) Power Dissipation (SOT-26, at Ambient Temperature = 85°C) Power Dissipation (DIP-8, at Ambient Temperature = 85°C) Lead temperature (Soldering, 10sec) ESD Voltage Protection, Human Body Model ESD Voltage Protection, Machine Model Gate Output Current
And to satisfy different designs, 2 versions of OVP levels are implemented as ---
z LD7530 --- 28.0V ± 1.2V.
z LD7530A --- 21.0V ± 1.2V.
Features
z High-Voltage CMOS Process with Excellent ESD protection
Oscillator for Switching Frequency
Frequency
Green Mode Frequency
Trembling Frequency
Temp. Stability
(-40°C ~105°C)
Voltage Stability
(VCC=11V-25V)
Pin Configuration (LD7530A)
DIP-8 (TOP VIEW)
SOT-26 (TOP VIEW)
GND COM P NC CT
8 765
TOP MARK YYWW##
OUT VCC CS
6
5
4
Y WP 30A
1
2
3
1 234
GND COMP CT
Y The PB free package is identified in embossed font
Recommended Operating Conditions
Item
Min.
Max.
Unit
Supply Voltage Vcc (LD7530)
11
25
V
Supply Voltage Vcc (LD7530A)
11
18
V
CT Value
0.047
0.1
µF
5
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
Pin Descriptions
PIN (SOT-26)
1 2
3
4 5 6
PIN (DIP-8)
8 7
5
4 2 1
NAME
ຫໍສະໝຸດ Baidu
FUNCTION
GND Ground Voltage feedback pin (same as the COMP pin in UC384X), By connecting
COMP a photo-coupler to close the control loop and achieve the regulation. This pin is to program the frequency of the low frequency timer. By
Package
TOP MARK
LD7530 PL
SOT-26
YWP/30
LD7530 PN
DIP-8
LD7530PN
LD7530A PL
SOT-26
YWP/30A
LD7530A PN
DIP-8
LD7530APN
Note: The LD7530 and LD7530A are ROHS compliant.
VCOMP=0V VCOMP=3V Protection tripped (OLP, OVP)
UVLO (off)
UVLO (on)
OVP Level
LD7530 LD7530A
Voltage Feedback (Comp Pin)
Short Circuit Current Open Loop Voltage
Blanking
+ 0.85V
PWM Comparator
Slope Compensation
OCP Comparator
5.0V
OLP Delay Counter
OVP OLP
OLP
Comparator
PG
OLP Delay
SQ R
Protection
SQ R
GND
4
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
CT connecting a capacitor to ground to set the frequency of trembling and OLP delay time.
CS Current sense pin, connect to sense the MOSFET current VCC Supply voltage pin OUT Gate drive output to drive the external MOSFET
Applications
z Switching AC/DC Adaptor and Battery Charger z Open Frame Switching Power Supply
Typical Application
1
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
Y The PB free package is identified in embossed font
YY, Y : Year code (D: 2004, E: 2005…..) WW, W: Week code P : LD75..
(Product family code) ## : Production code
LD7530/LD7530A
5/18/2007
Green-Mode PWM Controller with Frequency Trembling and Integrated Protections
REV: 02a
General Description
The LD7530/LD7530A are specifically designed for the low total system cost by integrating many functions, protections, and the EMI-improved solution in a tiny SOT-26 package which usually need a lot of extra components or circuits on the general designs.
LD7530/LD7530A
30V -0.3 ~7V 150°C -40°C to 85°C -65°C to 150°C 250°C/W 100°C/W 250mW 650mW 260°C 2.5 KV 250 V 300mA
Caution: Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
3
Leadtrend Technology Corporation LD7530&LD7530A-DS-02a May 2007
Block Diagram
LD7530/LD7530A
VCC
32V
UVLO Comparator
All
internal bias Blocks
16.0V/ 10.0V
VCC OK