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High Efficiency Bi-directional DC-DC Regulator With High Current Over Voltage Protection Switch

 2015-09-02

【產品特性】

• Low R DS(ON) for internal switches
- Input Reverse Blocking Switch: 50 mΩ
- High-side and Low-side Switches of Bi-directional Dc-Dc Regulator: 60 mΩ /60 mΩ
- Disconnect Switch: 30 mΩ
• 2.7V-16V Input Voltage Range
• 36V Storage Voltage Rating
• Programmable Input Current Limit from 1A to 5A
• Selectable Over Voltage Protectionn: 3.3V, 5.0V and 12V
• Reverse Blocking at Input Side
• Programmable Soft-start Time
• Integrated High Effciency Bi-directional Dc-Dc Regulator: Boost Charging Mode and Buck Discharging Mode Auto-alternating with Programmable System Voltage
• Quasi-Fixed Frequency Constant OFF Time
Control for Stable Operation: 500kHz
• Programmable Boost Charging Current
• Programmable Storage Voltage
• Power Path Management
• Short-circuit Protection at Energy Storage Side
• Enable Control
• RoHS Compliant and Halogen Free
• Compact package: QFN3X4-19

【產品應用】

• Solid-State Drivers
• Backup Power Supply

【文字介紹】

SY6402 is designed to achieve energy storage and release management for the applications of data backup in Solid-State Driver and other backup power supplies. The integrated bi-directional Dc-Dc regulator transfers the energy between the system side and the energy storage side with high efficiency. The quasi-fixed frequency constant off time control is employed to achieve stable operation and fast dynamic response.
Besides, a reverse blocking switch is integrated at the input side to prevent from energy leaking when the input power source is removed or inserted with inverse polarity. The programmable input current limit cooperates with the bi-directional Dc-Dc regulator to achieve power path management for better dynamic load response at the system side. Three different input voltage OVP thresholds are selectable for the applications with different kind of input power source. SY6402 along with QFN3X4-19 package provides compact PCB layout.