Sn51dp Datasheet ^hot^ -
is a standalone digital pulse width modulator (DPWM) and power management integrated circuit (IC) primarily used as an LED backlight driver
Pro tip: Always include a gate resistor and a snubber (RC) across the external power triac when switching inductive loads like fans or transformers. sn51dp datasheet
Device Categorization and Description
The first section of the SN51DP datasheet would typically define the product family. Assuming a lineage similar to standard SN51-series devices, the component is likely a general-purpose bipolar junction transistor (BJT) or a specialized switching diode. The "DP" suffix could indicate a Dual-Inline Package (DIP) or a distinct manufacturer grading for higher precision. The "Description" block provides the designer with the fundamental identity of the part—whether it is an NPN/PNP transistor, a logic gate, or a voltage regulator—allowing for immediate compatibility assessment with the project requirements. is a standalone digital pulse width modulator (DPWM)
When searching for the original document, prioritize service manuals and vintage datasheet archives. For new product development, consider upgrading to a current-generation IC like the LM2576 or XL4015. However, for repairing a classic audio amplifier, industrial controller, or CRT display, the SN51DP—with its straightforward pinout and forgiving design—is still a valuable component. Supply voltage (VCC): nominal value (e
Electrical Characteristics (typical datasheet items)
- Supply voltage (VCC): nominal value (e.g., 3.3 V) with allowed range
- Differential output voltage (VOD): typical and min/max (e.g., 350 mV ± tolerance)
- Single-ended output swing: values relative to common-mode
- Input common-mode range: acceptable Vin_cm range for reliable operation
- Propagation delay: tPD typical and max (ns)
- Skew: channel-to-channel skew spec (ps to ns)
- Power consumption: ICC typical and standby currents
- Output enable/disable timing: enable/disable propagation times
- ESD rating: HBM and MM levels
| Parameter | Conditions | Min | Typ | Max | Unit |
| :--- | :--- | :--- | :--- | :--- | :--- |
| Input Voltage Range | | 8 | | 45 | V |
| Quiescent Current | VFB = 0V, No switching | | 5 | 8 | mA |
| Shutdown Current | VIN only | | 100 | 200 | µA |
| Reference Voltage | VFB pin | 1.20 | 1.23 | 1.26 | V |
| Oscillator Frequency | | 45 | 60 | 75 | kHz |
| Switch Saturation Voltage | ISW = 2A | | 0.8 | 1.2 | V |
| Switch Leakage Current | VSW = 45V | | | 100 | µA |
| Current Limit Threshold | Duty cycle < 50% | 3.5 | 4.0 | 4.5 | A |
| Thermal Shutdown Temp | | | 150 | | °C |
is a standalone digital pulse width modulator (DPWM) and power management integrated circuit (IC) primarily used as an LED backlight driver
Pro tip: Always include a gate resistor and a snubber (RC) across the external power triac when switching inductive loads like fans or transformers.
Device Categorization and Description
The first section of the SN51DP datasheet would typically define the product family. Assuming a lineage similar to standard SN51-series devices, the component is likely a general-purpose bipolar junction transistor (BJT) or a specialized switching diode. The "DP" suffix could indicate a Dual-Inline Package (DIP) or a distinct manufacturer grading for higher precision. The "Description" block provides the designer with the fundamental identity of the part—whether it is an NPN/PNP transistor, a logic gate, or a voltage regulator—allowing for immediate compatibility assessment with the project requirements.
When searching for the original document, prioritize service manuals and vintage datasheet archives. For new product development, consider upgrading to a current-generation IC like the LM2576 or XL4015. However, for repairing a classic audio amplifier, industrial controller, or CRT display, the SN51DP—with its straightforward pinout and forgiving design—is still a valuable component.
Electrical Characteristics (typical datasheet items)
- Supply voltage (VCC): nominal value (e.g., 3.3 V) with allowed range
- Differential output voltage (VOD): typical and min/max (e.g., 350 mV ± tolerance)
- Single-ended output swing: values relative to common-mode
- Input common-mode range: acceptable Vin_cm range for reliable operation
- Propagation delay: tPD typical and max (ns)
- Skew: channel-to-channel skew spec (ps to ns)
- Power consumption: ICC typical and standby currents
- Output enable/disable timing: enable/disable propagation times
- ESD rating: HBM and MM levels
| Parameter | Conditions | Min | Typ | Max | Unit |
| :--- | :--- | :--- | :--- | :--- | :--- |
| Input Voltage Range | | 8 | | 45 | V |
| Quiescent Current | VFB = 0V, No switching | | 5 | 8 | mA |
| Shutdown Current | VIN only | | 100 | 200 | µA |
| Reference Voltage | VFB pin | 1.20 | 1.23 | 1.26 | V |
| Oscillator Frequency | | 45 | 60 | 75 | kHz |
| Switch Saturation Voltage | ISW = 2A | | 0.8 | 1.2 | V |
| Switch Leakage Current | VSW = 45V | | | 100 | µA |
| Current Limit Threshold | Duty cycle < 50% | 3.5 | 4.0 | 4.5 | A |
| Thermal Shutdown Temp | | | 150 | | °C |