IDCHIP 3525
Product Overview
The SG3525 is a versatile PWM control chip designed for all types of switching power supplies, offering improved performance and reduced external component count. Key features include a precise 5.1V 1% reference voltage, operation in master/slave or synchronized modes, and adjustable dead-time control via an external resistor. The integrated circuitry includes soft-start, shutdown, and undervoltage lockout functions. The output stage is a high-power totem-pole design capable of sourcing and sinking over 200mA.
Applications
- Switching Power Supplies
| Model | Package | Operating Temperature Range | VCC (Min) | VCC (Max) | Vref (Typ) | Oscillator Frequency (Max) | Peak Output Current (Source/Sink) |
|---|---|---|---|---|---|---|---|
| SG3525AN | DIP-16 | 0C to +70C | 8.0 V | 35 V | 5.1 V | 400 kHz | 400 mA |
| SG3525ADW | SO-16L | 0C to +70C | 8.0 V | 35 V | 5.1 V | 400 kHz | 400 mA |
| SG3527AN | DIP-16 | 0C to +70C | 8.0 V | 35 V | 5.1 V | 400 kHz | 400 mA |
| Parameter | Symbol | Min | Typ | Max | Unit | Condition |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 8.0 | - | 35 | Vdc | |
| Collector Supply Voltage | VC | 4.5 | - | 35 | Vdc | |
| Output Current (Sink) | IO | - | - | -100 | mA | |
| Output Current (Source) | IO | - | - | +100 | mA | |
| Reference Output Voltage | Vref | 5.00 | 5.10 | 5.20 | Vdc | VCC = +8.0 V to +35 V |
| Oscillator Frequency Range | fosc | 0.1 | - | 400 | kHz | |
| Oscillator Timing Resistor | RT | 2.0 | - | 150 | k | |
| Oscillator Timing Capacitor | CT | 0.001 | - | 0.2 | F | |
| Deadtime Resistor | RD | 0 | - | 500 | ||
| Operating Ambient Temperature | TA | 0 | - | +70 | C |
| Parameter | Symbol | Min | Typ | Max | Unit | Condition |
|---|---|---|---|---|---|---|
| Shutdown Input Current (Low) | 25 | 50 | 80 | A | V shutdown = 0 V | |
| Shutdown Input Current (High) | - | 0.4 | 0.6 | V | V shutdown = 2.0 V | |
| Output Low Voltage (Sink) | VOL | - | - | 0.2 | V | Each Output, VCC = +20 V, Isink = 20 mA |
| Output Low Voltage (Sink) | VOL | - | - | 1.0 | V | Each Output, VCC = +20 V, Isink = 100 mA |
| Output High Voltage (Source) | VOH | 18 | - | 19 | V | Isource = 20 mA |
| Output High Voltage (Source) | VOH | 17 | - | 18 | V | Isource = 100 mA |
| Undervoltage Lockout Threshold | VUL | 6.0 | 7.0 | 8.0 | V | VC = +35 V |
| Soft-start Current | - | - | 100 | A | ||
| Soft-start Voltage | - | - | 5.0 | V | ||
| Shutdown Current | IC(leak) | - | - | 200 | A | CL = 1.0 nF, TJ = 25C |
| Turn-on Delay Time | tr | - | 100 | 600 | ns | CL = 1.0 nF, TJ = 25C |
| Turn-off Delay Time | tf | - | 50 | 300 | ns | CL = 1.0 nF, TJ = 25C |
| Shutdown Delay | tds | - | 0.2 | 0.5 | s | VDS = +3.0 V, CS = 0, TJ = +25C |
| Supply Current | ICC | - | 14 | 20 | mA | VCC = +35 V |
TE Connectivity 2-330495-1
TE Connectivity 2383445-2
Amphenol SLPIPB50BSB0EH
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