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STR-Z2500 Series
Power IC for Current Resonant Type Switching Power Supply
with Half-Bridge Resonance, High Efficiency and Low Noise
■■■■
General Descriptions
The STR-Z2500 series products are power ICs for current resonant type switching power
supplies, incorporating a controller IC including high-side and low-side MOSFETs of
half-bridge type resonance and a floating-drive circuit. The product achieves high efficiency
and low noise power supply systems by the ZVS and ZCS. The product is recommended for
high-efficiency small and standardized power supplies because of easy circuit designs with
few external components.
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Features
Soft-Switched Multi-Resonant Zero Current Switch (SMZ)
The zero-current switching (ZSC) and zero-voltage switching (ZVS) of half-bridge type resonance achieve the
high efficiency and low noise systems.
24-pin SIP Package with Al-Fin (Sanken designation: SLA-24)
The product incorporates two power MOSFETs and a controller IC, and achieves small and highly integrated
systems by few external components and smaller area size.
Built-in Startup Circuit
Automatic Dead Time Adjustment Function for Wide Resonant Conditions
Burst-Oscillation Function
The function enables the stable output control at no load to light load conditions and improves the efficiency.
Soft-Start Function
Brown-In / Brown-Out Function
The function enables the oscillation start/stop by externally rated input voltage and makes protections at low
input voltage.
External Latch Protection (ELP)
The function enables the latch shutdown by external signal.
Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET
Various Protections
Overcurrent Protection (OCP)---------------------------------- Auto-Restart
Three-Step Protections Depending on Overcurrent Status
Overload Protection (OLP) ------------------------------------- Latch Shutdown
Overvoltage Protection (OVP) --------------------------------- Latch Shutdown
External Latch Protection (ELP)------------------------------- Latch Shutdown
Thermal Shutdown Protection (TSD) ------------------------- Latch Shutdown
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Applications
Switching Power Supplies for
Digital Consumer Equipment; LCD-TVs, PDP-TVs, etc.,
OA Equipment; Severs, Multi-Function Printers, etc.,
Industry Machines, Communication Devices, Others
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Product Lineup
Product No
SIP-24
R
MOSFET
V
MIN (V)
DSS
DS(ON)
(Ω)
MAX
STR-Z2527 250 0.12
STR-Z2586 500 0.94
STR-Z2587 500 0.56
STR-Z2588 500 0.35
STR-Z2589 500 0.30
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00V/D
Typical Application Circuit
VVVV
DDDDCCCC
SSSSTTTTRRRR----ZZZZ2222555500000000
DDDD((((HHHH))))
5555
VVVVBBBB
8888
CCCCoooonnnntttt....
DDDD((((LLLL))))
1111
rrrreeeegggg
11117777
VVVVsssseeeennnn
11110000
VVVVcccccccc
1111222211111111
FFFFBBBB
////OOOOLLLLPPPP
RRRRCCCC
GGGGNNNNDDDD OOOOCCCC
CCCCssssssss
11113333
11114444
RRRRVVVV
CCCCOOOOMMMM
11116666
11115555
22221111
11118888
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Typical Electrical Characteristics & Operation Waveforms
STR-Z2587 Power Supply Characteristics
Input: 380VDC, Output: 24V/8.5A (204W)
Efficiency η
1 0 0 %
9 8 %
9 6 %
9 4 %
9 2 %
9 0 %
8 8 %
8 6 %
8 4 %
(%)
0 5 0 1 0 0 1 5 0 2 0 0
No Load
Efficiency η －－－－ Output PowerP
CCCCvvvv
VVVV
OOOOUUUUTTTT
GGGGNNNNDDDD
CCCCiiii
OUT
Output Power
P
(W)
OUT
Heavy Load
VDS(Lo-side)
ID(Hi-side)
2A/D
2us/D
The contents in this document are subject to changes, for improvement and other purposes, without notice.
Make sure that this is the latest version of the document before use.
The operation and circuit examples in this document are provided for reference purposes only. Sanken assumes no liability for violation of industrial property, intellectual property, or other rights of
Sanken or third parties, that stem from these examples.
The user must take responsibility for considering and determining which objects the products in this document are used with.
Although Sanken will continue to improve the quality and reliability of its products,
semiconductor products, by their nature, have certain fault and failure rates. The user must take responsibility for designing and checking to secure the device and system so that a part failure may not lead
to human injury, fire, damages, or other losses.
The contents in this document must not be transcribed or copied without Sanken’s written consent.
Warning
SANKEN ELECTRIC CO.,LTD.
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