Specifications - Texas Instruments TPSF12C1QEVM User Manual

Evaluation Module Overview
1 Evaluation Module Overview
1.1 Introduction
The TPSF12C1QEVM evaluation module (EVM) is designed to conveniently evaluate the performance of the
TPSF12C1 active filter IC. The EVM helps to improve the CM EMI signature in single-phase AC power systems.
The TPSF12C1 provides a low shunt impedance path for CM noise in the frequency range of interest for EMI
measurement and helps to meet prescribed limits for EMI standards, such as:
• CISPR 11, EN 55011 – Industrial, Scientific and Medical (ISM) applications
• CISPR 25, EN 55025 – Automotive applications
• CISPR 32, EN 55032 – Multimedia applications
Enabling up to 30 dB of CM noise reduction at the lower end of specified frequency ranges (for example, 100
kHz to 3 MHz) significantly reduces the footprint, volume, weight and cost of the overall filter, especially the CM
chokes that are designed to attenuate lower-order harmonics – and hence are large size.
While rejecting the line-frequency component at 50 Hz or 60 Hz, the TPSF12C1 senses the high-frequency CM
noise-voltage disturbance on each power line using two Y-rated sense capacitors and injects a noise-canceling
current back into the power lines using a Y-rated inject capacitor. The GND terminal of the EVM requires a direct,
low-inductance connection to the chassis ground or Earth terminal of the filter circuit.
1.2 Kit Contents
• An EVM that includes the TPSF12C1 active EMI filter IC and associated low-voltage components
• EVM Disclaimer Read Me

1.3 Specifications

Table 1-1 lists the EVM specifications. V
PARAMETER
INPUT CHARACTERISTICS
(1)
VDD supply voltage, V
VDD
VDD UVLO turn-on threshold, V
VDD UVLO turn-off threshold, V
VDD supply current, enabled, I
VDD supply current, disabled, I
OUTPUT CHARACTERISTICS
(2)
Inject voltage, V
INJ
Inject current, I
INJ
SYSTEM CHARACTERISTICS
(3)
Common-mode EMI reduction
(4)
IC junction temperature, T
J
(1) The nominal supply voltage (relative to chassis GND) of the TPSF12C1 is 12 V.
(2) Verify that the INJ pin voltage swing is between the prescribed limits to avoid saturation and clipping.
(3) The expected EMI reduction with this EVM is up to 30 dB (with the device enabled vs. disabled) when swept from 100 kHz to 3 MHz.
This performance metric can change based on the VDD supply voltage, passive filter component values, active circuit compensation
and damping component values, ambient temperature, and other parameters.
(4) Calculate the TPSF12C1 operating junction temperature based on the VDD supply voltage and current, the local ambient temperature,
and the junction-to-ambient thermal resistance: T
1.4 Device Information
CM filters for both commercial (Class A) and residential (Class B) environments typically have limited Y-
capacitance due to touch-current safety requirements and thus require large-sized CM chokes to achieve
the requisite attenuation. This ultimately results in filter designs with bulky, heavy and expensive passive
components. The deployment of active filter circuits enable more compact filters for next-generation power
conversion systems.
2 Active EMI Filter Evaluation Module for Single-Phase AC Power Systems
= 12 V, unless otherwise noted.
VDD
Table 1-1. Electrical Performance Specifications
V rising
VDD(on) VDD
V falling
VDD(off) VDD
EN open or tied high
VDD(on)
EN tied to GND
VDD(off)
V = 8 V to 16 V
VDD
100 kHz to 1 MHz
= T + R
J A
Copyright © 2023 Texas Instruments Incorporated
CONDITIONS
× P , where the IC power dissipation is P
θJA D
SLVUCK7A – NOVEMBER 2022 – REVISED JULY 2023
www.ti.com
MIN TYP MAX UNIT
8 12 16
7.7 V
6.7
12.5 mA
50 µA
2.5 V – 2 V
VDD
–80 80 mA
25 dB
–40 150 °C
= V × I .
D VDD VDD
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