100V High Efficiency PSR/SSR Flyback Controller
![]()
- Parameters
- Features
- Description
| Part number |
SY5609QYQ |
| Channel(#) |
|
| Vin (min) (V) |
|
| Vin (max) (V) |
|
| Topology |
|
| Switching frequency (min)(kHz) |
|
| Switching frequency (max)(kHz) |
500 |
| Vout (min) (V) |
|
| Vout2 (min)(V) |
|
| Vout (max) (V) |
|
| Vout2 (max )(V) |
|
| Vref accuracy (±%) |
|
| Vout accuracy(±%) |
|
| Control mode |
|
| Duty cycle (max)(%) |
|
| Operation mode |
|
| Iq (typ) (uA) |
|
| Features |
|
| Package |
QFN4x4-20L |
| Operating temperature range(°C) |
-40 to 125 |
| Functional safety category |
|
- Integrated 100V HV Start-up circuit
- Flexible Topology：
- Primary-Side Regulated (PSR) Flyback (250kHz/400kHz Selectable)
- Secondary-Side Regulated (SSR) Flyback (Programmable Frequency)
- Precision Voltage Reference Output Diode Compensation in PSR Mode
- Source/Sink=0.5A/0.9A GATE Drivers Programmable Soft-start
- Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
- External Programmable Thermal Shutdown
- OLP compensation for wide-input range
- Cycle-by-Cycle Current Sense Limit
- Frequency Modulation for EMI reduction
- Hiccup Protection for OLP, SCP, OVP and Thermal Shutdown
The SY5609 is a fully-featured PWM controller integrated high voltage start-up circuit that operates over a wide input range up to 100V.
The SY5609 adopts current mode, quasi constantfrequency control to avoid sub-harmonic oscillation with no need of slope compensation. The SY5609 is specifically designed for both low cost, small size, high efficiency isolated solution with primary-side regulates (PSR) Flyback and Secondary-side regulates (SSR) Flyback application. Additional features include precision reference, output diode Compensation compensation (in PSR), over-voltage protection (in PSR) , line undervoltage lockout, cycle by cycle current limit, frequency modulation, soft-start, external programmable thermal shutdown and internal OTP.
The SY5609 is available in a QFN 4X4-20L package.
Evaluation Board
-
Photo of evaluation board
-
Photo of evaluation board
-
Photo of evaluation board
-
Photo of evaluation board
The EVB_SY5609QYQ is intended for evaluating 100V Current Mode PWM Controller
