UCC28084_TI 具有可编程斜率补偿、3.5ms 软启动、4.3/4.1 UVLO、温度范围为 -40°C 至 85°C 的电流模式推挽式 PWM

UCC28084的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：交流/直流和隔离式直流/直流开关稳压器 - PWM 控制器
功能描述：具有可编程斜率补偿、3.5ms 软启动、4.3/4.1 UVLO、温度范围为 -40°C 至 85°C 的电流模式推挽式 PWM
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UCC28084的产品详情：

The UCC38083/4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 110 ns, limiting each output’s duty cycle to less than 50%.

The new UCC3808x family is based on the UCC3808A architecture. The major differences include the addition of a programmable slope compensation ramp to the CS signal and the removal of the error amplifier. The current flowing out of the ISET pin through an external resistor is monitored internally to set the magnitude of the slope compensation function. This device also includes an internal discharge transistor from the CS pin to ground, which is activated at each clock cycle after the pulse is terminated. This discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.

The UCC38083 and the UCC38084 devices have a typical soft-start interval time of 3.5 ms while the UCC38085 and the UCC38086 has less than 100 µs for applications where internal soft-start is not desired.

The UCC38083 and the UCC38085 devices have the turn on/off thresholds of the 12.5 V / 8.3 V, while the UCC38084 and the UCC38086 has the turn on/off thresholds of 4.3 V / 4.1 V. Each device is offered in 8-pin TSSOP (PW), 8-pin SOIC (D) and 8-pin PDIP (P) packages.

UCC28084的优势和特性：

Programmable Slope Compensation
Internal Soft-Start on the UCC38083/4
Cycle-by-Cycle Current Limiting
Low Start-Up Current of 120 μA and 1.5 mA Typical Run Current
Single External Component Oscillator Programmable from 50 kHz to 1 MHz
High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
Current Sense Discharge Transistor to Improve Dynamic Response
Internally Trimmed Bandgap Reference
Undervoltage Lockout with Hysteresis
APPLICATIONS
- High-Efficiency Switch-Mode Power Supplies
- Telecom dc-to-dc Converters
- Point-of-Load or Point-of-Use Power Modules
- Low-Cost Push-Pull and Half-Bridge Applications

UCC28084的参数（英文）：

Topology
Half-Bridge, Push-Pull
Duty cycle (Max) (%)
50
Supply voltage (Max) (V)
15
UVLO thresholds on/off (V)
4.3/4.1
Features
Current Limiting, Multi-topology, Programmable Slope Compensation, Soft Start
Operating temperature range (C)
-40 to 85
Rating
Catalog
Frequency (Max) (kHz)
1000
Gate drive (Typ) (A)
1

UCC28084具体的完整产品型号参数及价格（美元）：

UCC28084的完整型号有：UCC28084D、UCC28084DR、UCC28084PW、UCC28084PWR，以下是这些产品的关键参数及官网采购报价：

UCC28084D，工作温度：-40 to 85，封装：SOIC (D)-8，包装数量MPQ：75个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28084D的批量USD价格：1.56（1000+）

UCC28084DR，工作温度：-40 to 85，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28084DR的批量USD价格：1.32（1000+）

UCC28084PW，工作温度：-40 to 85，封装：TSSOP (PW)-8，包装数量MPQ：150个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC28084PW的批量USD价格：1.56（1000+）

UCC28084PWR，工作温度：-40 to 85，封装：TSSOP (PW)-8，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC28084PWR的批量USD价格：1.32（1000+）

UCC28084的评估套件：

UCC28084的电路图解：

UCC28084的评估套件：