SP6003
Synchronous Rectifier Driver
DESCRIPTION
The fundamental of SP6003 synchronous
rectifier (SR) driver IC is based on our U.S.
patented methods that utilize the principle of
“prediction” logic circuit. The IC deliberates
previous cycle timing to control the SR in
present cycle by “predictive” algorithm that
makes adjustments to the turn-off time, in order
to achieve maximum efficiency and avoid
cross-conduction at the same time. It also
maintains the MOSFET’s body diode conduction
at minimum level. The SP6003 is capable to
adapt in almost all existing flyback converters
with few adjustments considered necessary.
FEATURES
•
Offers efficiency improvement over Schottky
Diode (depends on drive configuration of the
SR).
•
•
•
•
•
Drives all logic level Power MOSFET.
Prediction gate timing control.
Minimum MOSFET body diode conduction.
Operating frequency up to 350 KHz.
Synchronize to transformer
voltage waveform.
secondary
PART MARKING
APPLICATIONS
•
Servers & workstations
•
•
•
•
Storage area network power supplies
Telecommunication converters
Embedded systems
Industrial & commercial systems using high
current processors
PIN CONFIGURATION (SOP-8)
2006/03/28
Ver.3
Page 1
SP6003
Synchronous Rectifier Driver
TYPICAL APPLCATION CIRCUIT
PIN DESCRIPTION
Pin
1
2
3
4
5
6
7
8
Symbol
Timing
NC
Rapid-Adj
Cramp
GND
MOSG-C
Vdd
SYNC
No connection.
Capacitor connection to adjust fast pulse width reduction response.
Ramp capacitor adjustment to extend MOSFET’s gate timing.
Ground connection.
Catch MOSFET gate drive.
DC supply voltage.
Synchronized signal from transformer’s output.
Description
Discontinuous current filter timing adjustment resistor connection.
2006/03/28
Ver.3
Page 2
SP6003
Synchronous Rectifier Driver
BLOCK DIAGRAM
ORDERING INFORMATION
Part Number
SP6003S8RG
SP6003S8TG
※
SP6003S8RG : 7” Tape Reel ; Pb – Free
※
SP6003S8TG : Tube ; Pb – Free
Package
SOP-8
SOP-8
Part Marking
SP6003I
SP6003I
ABSOULTE MAXIMUM RATINGS
(TA=25
℃
, unless otherwise specified.)
The following ratings designate persistent limits beyond which damage to the device may occur
.
Symbol
V
dd
SYNC
I
OUT
P
D
T
J
T
STG
T
LEAD
Parameter
DC Supply Voltage
SYNC Voltage
Peak Source Current (Pulsed)
Peak Sink Current (Pulsed)
Power Dissipation @ T
A
=85
℃
(*)
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature for 5 sec.
Value
7
7.5
1
1.5
0.25
-40 to 150
-40 to 150
260
Unit
V
V
A
A
W
℃
℃
℃
2006/03/28
Ver.3
Page 3
SP6003
Synchronous Rectifier Driver
THERMAL RESISTANCE
Symbol
R
ӨJC
Parameter
Thermal Resistance Junction – Case (*)
Value
45
Unit
℃
/W
(*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions.
ELECTRICAL CHARACTERISTICS
(T
A
=25
℃
, V
dd
=5V, V
SYNC
=5V, Freq. =300 KHz, Duty Cycle=50%, unless otherwise specified.)
Symbol
Parameter
No load
Conditions
Min.
4
3.8
3.9
Typ.
5.5
5.0
4.1
5.0
0.9
4.9
0.1
20
28
23
Max.
8
7.0
Unit
mA
V
V
V
V
V
V
ns
ns
ns
SUPPLY INPUT
I
DD
Supply current
Vonth
Vdd turn on threshold
Voffth
Vdd turn off threshold
SYNC REFERENCE
(SYNC)
Vshth
SYNC high threshold
Vslth
SYNC low threshold
MOSFET GATE DRIVER
(MOSG-C)
Voh
Output high voltage
Vol
Output low voltage
Td
Propagation delay
Tr
Rise time
Tf
Fall time
1.2
5.0
0.2
25
36
30
Io
= -200mA
Io
= 200mA
No load
Load = 1nF (*)
Load = 1nF (*)
4.8
0.0
15
24
20
(*) Tr & Tf are measured among 10% and 90% of starting and final voltage.
2006/03/28
Ver.3
Page 4
SP6003
Synchronous Rectifier Driver
PERFORMANCE CHARACTERISTICS
(T
A
=25
℃
, unless otherwise specified.)
Figure 1: Supply Current vs Supply Voltage
10
9
8
7
6
I
D D
5
(m A)
4
3
2
1
0
3.3 3.5 3.7 4 4.2 4.4 4.6 4.9 5 5.3 5.5 5.7 6.1
V
D D
(V)
Figure 2: Output Rise Tim e vs Load Capacitor
70
60
50
Tim e
40
(ns)
30
20
10
0
220
330
470
680
1000
1330 1680
20
18
16
14
12
I
D D
10
(m A)
8
6
4
2
0
220 330 470 680 1000 1560 2200 2530 2880
C
Loa d
(pF)
Figure 4: Supply Current vs Load Capacitor
Figure 5: Supply Current vs Freq. @ No Load
7
6
5
I
D D
4
(m A)
3
2
1
0
20
50 81 154 184 256 327 380 425 484 554
Frequency (kHz)
C
Lo ad
(pF)
Figure 3: Output Fall Tim e vs Load Capacitor
70
60
50
Tim e
40
(ns)
30
20
10
0
220
330
470
680
1000
1330
1680
20
18
16
14
12
I
D D
10
(m A)
8
6
4
2
0
Figure 6: Supply Current vs Freq. @ Load=1nF
30
50
70
93
119 128 149 170 176
C
Lo a d
(pF)
Frequency (kHz)
*Fig. 2-4: Frequency = 85 kHz.
2006/03/28
Ver.3
Page 5
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