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STR-Y6766A Data Sheet PDF ( 数据手册 , 数据表 )

零件编号 STR-Y6766A
描述 Quasi-Resonant Controllers
制造商 Sanken
LOGO Sanken LOGO 



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STR-Y6766A 数据手册, 描述, 功能
Quasi-Resonant Controllers with Integrated Power MOSFET
STR-Y6700 Series
General Descriptions
The STR-Y6700 series are power ICs for switching
power supplies, incorporating a MOSFET and a
quasi-resonant controller IC.
Including an auto standby function in the controller,
the product achieves the low standby power by the
automatic switching between the PWM operation in
normal operation, one bottom-skip operation under
medium to light load conditions and the burst-oscillation
under light load conditions.
The product achieves high cost-performance power
supply systems with few external components.
Features
Multi-mode Control
The optimum operation depending on load conditions
is changed automatically and is achieved high
efficiency operation across the full range of loads.
Operation Mode
Normal load -------------------------Quasi-resonant mode
Medium to light load -------------One bottom-skip mode
Light load -------------------------- Burst oscillation mode
(Auto standby function)
No load power consumption
PIN < 30 mW (100VAC)
PIN < 50 mW (230VAC)
Leading Edge Blanking Function
Bias Assist Function
Built-in startup circuit reduces
Protections
Overcurrent Protection 1 (OCP1): Pulse-by-Pulse, with
Input Compensation Function
Overcurrent Protection 2 (OCP2)(1): Latched shutdown
Overload Protection (OLP): Latched shutdown
Overvoltage Protection (OVP): Latched shutdown
Thermal Shutdown Protection (TSD): Latched shutdown
(1) Products with the last letter "A" don’t have the
OCP2 function.
Typical Application
VAC
BR1
C1
U1
STR-Y6700
1 2 3 4 5 67
T1
P
D51
C51
S
L51
R54
PC1 R51
R55
R52
D2 R2
C3 D
C52 R53
U51
R56
DZBD
RBD1
VOUT(+)
C53
VOUT(-)
Package
TO220F-7L
Not to Scale
Lineup
Electrical Characteristics
Products
STR–Y6735
STR–Y6735A
VDSS(min.)
500 V
STR–Y6753
STR–Y6754
650 V
STR–Y6766
STR–Y6766A
STR–Y6765
800 V
STR–Y6763
STR–Y6763A
RDS(ON)(max.)
0.8 Ω
1.9 Ω
1.4 Ω
1.7 Ω
2.2 Ω
3.5 Ω
Output Power, POUT(2)
Products
POUT (Open frame)
380VDC
85~265VAC
STR–Y6735
STR–Y6735A
120 W(100VAC)
STR–Y6753
100 W
60 W
STR–Y6754
STR–Y6766
STR–Y6766A
STR–Y6765
STR–Y6763
STR–Y6763A
120 W
140 W
120 W
80 W
67 W
80 W
70 W
50 W
(2) The output power is actual continues power that is measured at
50 °C ambient. The peak output power can be 120 to 140 % of
the value stated here. Core size, ON Duty, and thermal design
affect the output power. It may be less than the value stated here.
Applications
White goods
Office automation equipment
Industrial equipment
ROCP
R3
C4 C5 PC1
CBD
RBD2
CY
STR-Y6700 - DS Rev.4.1
Jun. 09, 2016
SANKEN ELECTRIC CO.,LTD.
http://www.sanken-ele.co.jp/en/
1




STR-Y6766A pdf, 数据表
STR-Y6700 Series
3.3 MOSFET Safe Operating Area Curves
When the IC is used, the safe operating area curve should be multiplied by the temperature derating coefficient
derived from Figure 3-1.
The broken line in the safe operating area curve is the drain current curve limited by on-resistance.
Unless otherwise specified, TA = 25 °C, Single pulse
STR–Y6735, STR–Y6735A
100
STR–Y6753
100
0.1ms
0.1ms
10
10
1ms
1
1 1ms
0.1
0.1
10
100
Drain-to-Source Voltage (V)
STR–Y6754
100
1000
0.01
10
100
Drain-to-Source Voltage (V)
1000
STR–Y6763, STR–Y6763A
10
0.1ms
0.1ms
10 1
1ms
1
0.1
1ms
0.1
10
100
Drain-to-Source Voltage (V)
1000
0.01
10
100
Drain-to-Source Voltage (V)
STR–Y6765
10
0.1ms
STR–Y6766, STR–Y6766A
100
1000
1ms
1
10
0.1ms
1ms
0.1 1
0.01
10
100
Drain-to-Source Voltage (V)
1000
0.1
10
100
Drain-to-Source Voltage (V)
1000
STR-Y6700 - DS Rev.4.1
Jun. 09, 2016
SANKEN ELECTRIC CO.,LTD.
8


STR-Y6766A equivalent, schematic
STR-Y6700 Series
Table 9-1 The meaning of symbols in Figure 9-8
Symbol
VIN
VFLY
VDS
NP
NS
VO
VF
ID
IOFF
CV
LP
Descriptions
Input voltage
Flyback voltage
( )VFLY
=
NP
NS
×
VO
+ VF
The voltage between Drain and Source of
power MOSFET
Primary side number of turns
Secondary side number of turns
Output voltage
Forward voltage drop of the secondary
side rectifier
Drain current of power MOSFET
Current which flows through the
secondary side rectifier when power
MOSFET is off
Voltage resonant capacitor
Primary side inductance
tONDLY
VDS 0
Bottom point
VFLY
VIN
IOFF 0
The threshold voltage of quasi-resonant operation has
a hysteresis. VBD(TH1) is Quasi-Resonant Operation
Threshold Voltage 1, VBD(TH2) is Quasi-Resonant
Operation Threshold Voltage 2.
When the BD pin voltage, VREV2, increases to
VBD(TH1) = 0.24 V or more at the power MOSFET
turns-off, the power MOSFET keeps the off-state. After
that, the VDS decreases by the free oscillation. When the
VDS decreases to VBD(TH2) = 0.17 V, the power MOSFET
turns-on and the threshold voltage goes up to VBD(TH1)
automatically to prevent malfunction of the BD pin from
noise interference.
VIN C1
VIN VFLY
T1
P
CV
13
D/ST VCC
U1
2 S/OCP GND
ROCP
4
BD 6
CBD
D2
C3
R2 D
VREV1 VFW1
DZBD
RBD1
Forward voltage
Flyback voltage
RBD2
VREV2
Figure 9-10 BD pin peripheral circuit
ID 0
tON
Figure 9-9 Ideal bottom-on operation waveform
9.7.2 Bottom-On Timing Setup
BD pin detects the signal of bottom-on timing and
input compensation of OCP1 (refer to Section 9.12.3).
Figure 9-10 shows the BD pin peripheral circuit, Figure
9-11 shows the waveform of auxiliary winding voltage.
The quasi-resonant signal, VREV2, is proportional to
auxiliary winding voltage, VD and is calculated as
follows:
( )VREV2
=
R BD2
R BD1 + R BD2
×
VREV1 VF
(4)
where,
VREV1: Flyback voltage of auxiliary winding D
VF : Forward voltage drop of ZBD
The BD pin detects the bottom point using the VREV2.
Auxiliary
winding
voltage, VD VREV1
0
VFW1
3.0 V recommended,
but less than 6.0 V acceptable
Quasi-resonant
Signal, VREV2
VBD(TH1)
0
tON
VBD(TH2)
Figure 9-11 The waveform of auxiliary winding voltage
RBD1 and RBD2 Setup
RBD1 and RBD2 should be set so that VREV2 becomes
the following range:
Under the lowest condition of VCC pin voltage in
power supply specification, VREV2 VBD(TH1)= 0.34
V(max.).
Under the highest condition of VCC pin voltage in
STR-Y6700 - DS Rev.4.1
Jun. 09, 2016
SANKEN ELECTRIC CO.,LTD.
16



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零件编号描述制造商
STR-Y6766Quasi-Resonant ControllersSanken
Sanken
STR-Y6766AQuasi-Resonant ControllersSanken
Sanken

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