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Failure to follow warnings and instructions may result in personal injury, property damage, or death due to electrical shock and/or burn hazards.
The term TI HV EVM refers to an electronic device typically provided as an open framed, unenclosed printed-circuit board assembly. It is intended strictly for use in development laboratory environments, solely for qualified professional users having training, expertise, and knowledge of electrical safety risks in development and application of high-voltage electrical circuits. Any other use and/or application are strictly prohibited by Texas Instruments. If you are not suitably qualified, you should immediately stop from further use of the HV EVM.
As a precautionary measure, it is always a good engineering practice to assume that the entire EVM may have fully accessible and active high voltages.
Safety and Precautions
The EVM is designed for professionals who have received the appropriate technical training, and is designed to operate from an AC power supply or a high-voltage DC supply. Please read this user guide and the safety-related documents that come with the EVM package before operating this EVM.
Do not leave the EVM powered when unattended.
Hot surface! Contact may cause burns. Do not touch!
High Voltage! Electric shock is possible when connecting board to live wire. Board should be handled with care by a professional.
For safety, use of isolated test equipment with overvoltage and overcurrent protection is highly recommended.
Unless otherwise specified the following condition apply: TA = 25ºC, IOUT1 = Primary output current, IOUT2 = Secondary output current. LM5168FQEVM; both EVMs are identical, except for the converter IC installed.
Parameter | Test Conditions | MIN | TYP | MAX | UNITS | |
---|---|---|---|---|---|---|
INPUT CHARACTERISTICS | ||||||
Input voltage range, VVIN | EVM input voltage operating range | 20 | 48 | 115 | V | |
Input voltage turn on, VIN(ON) | Adjusted by EN/UVLO resistors | 6.0 | V | |||
Input voltage turn off, VIN(OFF) | 5.6 | V | ||||
Input voltage hysteresis, VIN(HYS) | 0.4 | V | ||||
Input current, no load, IIN(NL) | IOUT = 0 A | VIN = 48 V | 13 | mA | ||
Input current, disabled, IIN(OFF) | VEN/UVLO = 0 V, no EN divider | VIN = 36 V | 10 | µA | ||
OUTPUT CHARACTERISTICS | ||||||
Output voltage, VOUT1 | VIN = 48 V, IOUT1 = IOUT2 = 0A | 10.0 | V | |||
Output voltage, VOUT2 | VIN = 48 V, IOUT1=0 A, IOUT2 = 0A | 10.0 | ||||
Output Current, IOUT: Total for both outputs | VIN = 48 V | 0.25 | A | |||
Output voltage regulation, ΔVOUT1 | Load regulation, VIN = 48 V | IOUT1 = 0 A to 0.25 A, IOUT2 = 0 A | 1 | mV | ||
Output voltage regulation, ΔVOUT2 | Load regulation, VIN = 48 V | IOUT1 = 0 A to 0.25 A, IOUT2 = 0 A | 200 | |||
Output voltage regulation, ΔVOUT1 | Load regulation, VIN = 48 V | IOUT2 = 0 A to 0.25 A, IOUT1 = 0 A | 7 | |||
Output voltage regulation, ΔVOUT2 | Load regulation, VIN = 48 V | IOUT2 = 0 A to 0.25 A, IOUT1 = 0 A | 1000 | |||
Output voltage regulation, ΔVOUT1 | Line regulation, IOUT1 = IOUT2 = 0 A | VIN = 24 V to 115 V | 50 | |||
Output voltage regulation, ΔVOUT2 | Line regulation, IOUT1 = IOUT2 = 0 A | VIN = 24 V to 115 V | 750 | |||
Maximum Output Current | VIN = 48 V | 0.27 | A | |||
Soft-start time, tSS | 3.5 | ms | ||||
SYSTEM CHARACTERISTICS | ||||||
Switching frequency | VIN = 36 V, IOUT1 = 0 A , IOUT2 = 0 A | 730 | kHz | |||
Half-load efficiency | IOUT1 = IOUT2 = 0.08 A | VIN = 48 V | 70 % | |||
Full load efficiency | IOUT1 = IOUT2 = 0.125 A | VIN = 48 V | 76 % | |||
VIN = 60 V | 72 % |
The LM5169FQEVM EVM is configured to deliver a regulated 10-V output, 0.3 A at 750-kHz switching frequency, and an additional 10-V, 0.3 A floating output. The LM5169 uses a COT control architecture, with input voltage feed-forward, to provide constant frequency regulator with tightly regulated output voltage. This type of control requires adequate voltage ripple at the FB input to achieve stable regulation. The LM5169FQEVM is set up with type III ripple injection to minimize the output voltage ripple, while ensuring a stable regulator. The LM5169FQEVM also provides the option to use type I or type II ripple injection. See the LM5169 data sheet for more information. An overall view of the LM5169FQEVM and the schematic are shown inFigure 3-1, and Figure 4-1 respectively.
Please note that for EVMs labeled as LM5168FQEVM, that the LM5168F is installed and approximately one half of the load current is available from this device. Both EVMs are identical, except for the converter IC installed.