ZHCSOH8F July 2021 – August 2024 TPS7H5001-SP , TPS7H5002-SP , TPS7H5003-SP , TPS7H5004-SP
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Device Comparison Table
- 5 Device Options
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Electrical Characteristics: All Devices
- 7.6 Electrical Characteristics: TPS7H5001-SP
- 7.7 Electrical Characteristics: TPS7H5002-SP
- 7.8 Electrical Characteristics: TPS7H5003-SP
- 7.9 Electrical Characteristics: TPS7H5004-SP
- 7.10 Typical Characteristics
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 VIN and VLDO
- 8.3.2 Start-Up
- 8.3.3 Enable and Undervoltage Lockout (UVLO)
- 8.3.4 Voltage Reference
- 8.3.5 Error Amplifier
- 8.3.6 Output Voltage Programming
- 8.3.7 Soft Start (SS)
- 8.3.8 Switching Frequency and External Synchronization
- 8.3.9 Primary Switching Outputs (OUTA/OUTB)
- 8.3.10 Synchronous Rectifier Outputs (SRA and SRB)
- 8.3.11 Dead Time and Leading Edge Blank Time Programmability (PS, SP, and LEB)
- 8.3.12 Pulse Skipping
- 8.3.13 Duty Cycle Programmability
- 8.3.14 Current Sense and PWM Generation (CS_ILIM)
- 8.3.15 Hiccup Mode Operation (HICC)
- 8.3.16 External Fault Protection (FAULT)
- 8.3.17 Slope Compensation (RSC)
- 8.3.18 Frequency Compensation
- 8.3.19 Thermal Shutdown
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Switching Frequency
- 9.2.2.2 Output Voltage Programming Resistors
- 9.2.2.3 Dead Time
- 9.2.2.4 Leading Edge Blank Time
- 9.2.2.5 Soft-Start Capacitor
- 9.2.2.6 Transformer
- 9.2.2.7 Main Switching FETs
- 9.2.2.8 Synchronous Rectificier FETs
- 9.2.2.9 RCD Clamp
- 9.2.2.10 Output Inductor
- 9.2.2.11 Output Capacitance and Filter
- 9.2.2.12 Sense Resistor
- 9.2.2.13 Hiccup Capacitor
- 9.2.2.14 Frequency Compensation Components
- 9.2.2.15 Slope Compensation Resistor
- 9.2.3 Application Curves
- 9.3 Power Supply Recommendations
- 9.4 Layout
- 10Device and Documentation Support
- 11Revision History
- 12Mechanical, Packaging, and Orderable Information
封裝選項
請參考 PDF 數據表獲取器件具體的封裝圖。
機械數據 (封裝 | 引腳)
- HFT|22
- KGD|0
- PW|24
散熱焊盤機械數據 (封裝 | 引腳)
訂購信息
8.3.18 Frequency Compensation
Since the TPS7H500x-SP uses a transconductance error amplifier (OTA), either Type 2A or Type 2B frequency compensation can be applied. The primary difference between the two compensation schemes is that Type 2A has an additional capacitor CHF in parallel with RCOMP and CCOMP in order to provide high-frequency noise attenuation. These components will be connected between the COMP pin of the controller, which is the OTA output, and AVSS.
Figure 8-17 TPS7H500x-SP Frequency
Compensation OptionsFor any of the topologies supported by the TPS7H500x-SP, the following procedure and equations can be used to select the compensation components. All parameters in the equations are in standard units unless otherwise indicated (that is, H for inductance, F for capacitance, Hz for frequency, and so on).
- Select the desired crossover frequency (fc) for the converter.
- Calculate RCOMP based on the selected crossover frequency fc.
-
Equation 19.
where:
- gmea is the error amplifier transconductance of 1800 × 10-6 A/V (typical)
- VREF is the 0.613 V reference voltage (typical)
- gmPS is the power stage transconductance (see Equation 23)
- Calculate CCOMP to
place compensation zero at the location of the power stage dominant
pole.Equation 20.
- Determine the output capacitor
ESR zero location (optional).Equation 21.
- Select the capacitor
CHF to provide a high frequency pole to compensate for the ESR
zero (optional).Equation 22.
For different power converter topologies, the primary change to the compensation selection procedure will be the determination of the power stage transconductance gmPS. The power stage transconductance can be calculated as shown in Equation 23.
- NP is the number of primary turns on the main power transformer (set to 1 if no transformer is used)
- NS is the number of secondary turns on the main power transformer (set to 1 if no transformer is used)
- NCSP is the number of primary turns on the current sense transformer (set to 1 if no transformer is used)
- NCSS is the number of secondary turns of the current sense transformer (set to 1 if no transformer is used)
- RCS is the selected value of the current sense resistor
- CCSR is the ratio to COMP of CS_ILIM
Note that for the TPS7H500x-SP controllers, the sensed current waveform is compared to the voltage at COMP divided down by the factor CCSR at the PWM comparator, which is accounted for in the denominator of the equation. For buck converters, all turns for the main power transformer can be set equal to 1 and the equation still applies.