Product introduction：
Product Introduction:
SI4909DY-VB is a dual P+N channel MOSFET in SOP8 package, suitable for bipolar current control in fields such as high-efficiency switching power supplies, battery management and electric vehicles. This model has a maximum drain-source voltage (V_DS) of -30V and a maximum gate-source voltage (V_GS) of ±12V, which is suitable for power control in low-voltage environments. SI4909DY-VB adopts Trench technology to provide excellent conduction performance and low power consumption characteristics. Its on-resistance (R_DS(ON)) is 28mΩ (at V_GS=4.5V) and 21mΩ (at V_GS=10V), respectively, and can support a maximum drain current (I_D) of -8A. Due to its dual P+N channel structure, SI4909DY-VB is particularly suitable for application scenarios that require positive and negative current control, and can provide stable performance in high-efficiency power conversion and load management.
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Product parameter：
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds2.5 |
Rds4.5 |
Rds10 |
Technology |
| SOP8 |
Dual-P+P |
-30V |
|
-1.7V |
-8A |
|
|
21mΩ |
Trench |
| VB Package |
Configuration |
VCE |
VGE |
VGEth(V) |
VCEsat15V |
ICE |
Technology |
| SOP8 |
Dual-P+P |
|
|
|
|
|
Trench |
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds18 |
Technology |
| SOP8 |
Dual-P+P |
-30V |
|
-1.7V |
-8A |
|
Trench |
| VB Package |
Configuration |
VDS(V) |
VGS |
Vthyp（V） |
ID(A) |
Rds6 |
Technology |
| SOP8 |
Dual-P+P |
-30V |
|
-1.7V |
-8A |
|
Trench |
| VB Package |
Polarity |
Vz / VR |
Pd |
VF |
IF |
IR |
Cd |
Type |
| SOP8 |
Dual-P+P |
|
|
|
|
|
|
|
Detailed parameter description:
- **Model**: SI4909DY-VB
- **Package**: SOP8
- **Configuration**: Dual-P+N-Channel
- **Maximum drain-source voltage (V_DS)**: -30V
- **Maximum gate-source voltage (V_GS)**: ±12V
- **Threshold voltage (V_th)**: -1.7V
- **On-resistance (R_DS(ON))**:
- 28mΩ @ V_GS = 4.5V
- 21mΩ @ V_GS = 10V
- **Maximum drain current (I_D)**: -8A
- **Technology**: Trench technology
- **Maximum power loss**: The power loss depends on the current load, on-resistance and heat dissipation conditions. Heat dissipation design usually needs to be considered in high current applications.
Domain and module applications：
Application fields and modules:
1. **Bidirectional DC-DC power converter**:
- The dual P+N channel structure of SI4909DY-VB makes it very suitable for bidirectional DC-DC converters. Such converters are widely used in battery management systems, solar systems, electric vehicles and other scenarios where bidirectional current flow is required. The low on-resistance and good thermal performance of SI4909DY-VB can effectively improve the power conversion efficiency and reduce energy loss.
2. **Battery management and charging system**:
- Due to its bipolar control characteristics, SI4909DY-VB has significant advantages in battery charging and battery management systems. It can be used in intelligent battery charging circuits to achieve precise current control and load balancing. Especially in lithium battery management systems, this MOSFET can effectively improve the charging and discharging efficiency while reducing the power consumption of the system.
3. **Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV)**:
- In the power control systems of electric vehicles (EV) and hybrid electric vehicles (HEV), SI4909DY-VB acts as a power switch element to control motor drive, charge management and battery connection. Its dual-channel structure has special advantages in realizing electric drive and feedback control, helping to improve the overall energy efficiency of electric vehicles.
4. **Positive and Negative Voltage Control System**:
- The dual P+N channel design of this MOSFET makes it particularly suitable for positive and negative voltage control systems. In systems such as audio amplifiers and power inverters that require dual power supplies or load regulation, SI4909DY-VB can provide precise voltage control and switching conversion to ensure stable system operation.
5. **High-efficiency Switching Power Supply (SMPS)**:
- SI4909DY-VB can be used in high-efficiency switching power supply designs, such as small and medium-power DC-DC converters, AC-DC power adapters, etc. Its low on-resistance can minimize switching losses and improve overall energy efficiency, and is suitable for a wide range of applications such as consumer electronics and communication equipment.
6. **Load switching and protection circuit**:
- In load switching and protection circuits, SI4909DY-VB can provide stable load control, especially under high current conditions, to ensure that the circuit will not be damaged by current overload. It is widely used in power protection systems, battery protection systems, and power monitoring circuits to ensure long-term and reliable operation of electrical equipment.
By using SI4909DY-VB, designers can achieve excellent performance in multiple high-efficiency power management systems that require positive and negative current control, while providing low-power, high-reliability solutions, which are widely used in battery drive, automotive power supply, switching power supply, and protection circuits.
* Please note: the above is only an example application scenario, the specific application depends on the requirements and conditions of the system design. When using this device, consult its data sheet for detailed technical specifications and features
Technical support：
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