| Type # | MOSFET VDSS(V) | RDS(on)(Max) (Ω) | VAC Input (V) | POUTa(W) |
|---|---|---|---|---|
| STR-X6729b | 450 | 0.189 | 120 | 460 |
| STR-X6737 | 500 | 0.36 | 120 | 280 |
| STR-X6757 | 650 | 0.62 | Wide | 165 |
| 230 | 320 | |||
| STR-X6759Nb | 0.385 | Wide | 250 | |
| 230 | 460 | |||
| STR-X6768Nb | 800 | 1.00 | Wide | 250 |
| 230 | 460 | |||
| STR-X6769 | 0.66 | Wide | 210 | |
| 230 | 310 | |||
| a The listed output power represents thermal ratings, and the peak output power, POUT , is obtained by 120% to 140% of the thermal rating value. In case of low output voltage and narrow on-duty cycle, the POUT (W) becomes lower than the above. | ||||
| b Auto-standby mode not included. | ||||
Features and Benefits
- Auto standby mode (burst oscillation) or manual standby mode (UVLO intermittent oscillation) in the standby mode.
- In addition to the standard quasi-resonant operation, a bottom-skip mode is available for increased efficiency from light to medium load.
- Soft-start operation at start-up.
- Reduced switching noise (compared to conventional PWM hard-switching solution) with a step-drive function.
- Built-in avalanche-energy-guaranteed power MOSFET (to simplify surge-absorption circuit; no VDSS derating is required).
- Overcurrent protection (OCP), overvoltage protection (OVP), overload protection (OLP), and maximum On-time control circuits are incorporated; OVP and OLP go into a latched mode.
Applications
- Set Top Box
- LCD PC monitor, LCD TV
- Printer, Scanner
- SMPS power supplies
Description
The STR-X6700 series integrates a quasi-resonant control IC and a MOSFET with avalanche guarantee. In normal operation, the device provides high efficiency and low EMI noise with bottom-skip quasi-resonant operation during light output loads. Low power consumption is also achieved by Auto-standby mode (not available in the STR-X6729, STR-X6759N, or STR-X6768N) or manual standby mode (external trigger).
The device is supplied in a seven-pin fully-molded TO-3Pstyle package, which is suitable for downsizing and standardizing of an SMPS by reducing external component count and simplifying circuit design.
Functional Block Diagram
