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UCC25800-Q1_V01 PDF预览

UCC25800-Q1_V01

更新时间: 2024-12-02 02:52:07
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德州仪器 - TI /
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描述
UCC25800-Q1 Ultra-low EMI Transformer Driver for Isolated Bias Supplies

UCC25800-Q1_V01 数据手册

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UCC25800-Q1  
SLUSDX3B – NOVEMBER 2020 – REVISED NOVEMBER 2021  
UCC25800-Q1 Ultra-low EMI Transformer Driver for Isolated Bias Supplies  
The transformer driver has a programmable frequency  
1 Features  
range of 100 kHz to 1.2 MHz. This high switching  
frequency reduces the transformer size and footprint,  
as well as the overall cost of the bias supply. The  
integrated SYNC function allows the system bias  
supplies to synchronize with an external clock signal,  
further reducing the system level noise.  
High-efficiency half-bridge transformer driver  
Ultra-low EMI with low interwinding capacitance  
Smaller and lower-cost transformer  
– Programmable frequency: 0.1 MHz to 1.2 MHz  
Wide input voltage range: 9 V to 34 V  
– 9 W from 34-V input  
The dead-time adjusts automatically to minimize  
the conduction loss and simplify the design. The  
programmable maximum dead-time ensures power  
stage design flexibility.  
– 6 W from 24-V input  
– 4 W from 15-V input  
Automatic dead-time adjustment with maximum  
dead-time programming  
With the integrated, low-resistance switching power  
stage, the transformer driver can achieve a 6-W  
design with 24-V input, and up to 9-W from 34-V  
input. With a fixed input voltage, the open-loop control  
also helps the output regulation to remain ±5% when  
the load is above 10%.  
External clock synchronization for low noise  
Robust protection features  
– Undervoltage lockout (UVLO)  
– Programmable over-current protection (OCP)  
– Input overvoltage protection (OVP)  
– Over temperature protection (TSD)  
– Integrated soft-start to reduce in-rush current  
– External disable function with fault-code output  
AEC-Q100 qualified for automotive applications:  
Temperature grade 1: –40°C to +125°C, TA  
Functional Safety-Capable  
Documentation available to aid functional safety  
system design  
The programmable overcurrent protection (OCP)  
allows flexibility on the power stage design to  
minimize the transformer size. The protection features  
such as adjustable OCP, input OVP, TSD and the  
protection from pin faults ensure robust operation.  
A fixed 1.5-ms soft-start period reduces the inrush  
current during start-up and fault recovery.  
8-Pin DGN package with thermal pad  
The transformer driver also provides a dedicated  
multi-function pin for external disabling, and fault code  
reporting. The fault code reporting sends the fault  
code once the bias supply is in the protection mode.  
2 Applications  
Automotive traction inverter & motor control  
Automotive on-board charger (OBC)  
Automotive DC/DC converter  
EV charging station, DC fast charging station  
UPS and solar inverters  
Industrial motors, elevators and escalators  
GaN, IGBT and SiC gate transformer driver bias  
supply  
The UCC25800-Q1 transformer driver is offered in an  
8-pin DGN package with the thermal pad to enhance  
its thermal handling capability.  
Device Information  
PART NUMBER  
PACKAGE(1)  
BODY SIZE (NOM)  
UCC25800-Q1  
HVSSOP (8)  
3.00 mm × 3.00 mm  
3 Description  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
The UCC25800-Q1 ultra-low EMI transformer driver  
integrates the switching power stage, the control, and  
the protection circuits to simplify isolated bias supply  
designs. It allows the design to utilize a transformer  
with higher leakage inductance, but much smaller  
parasitic primary-to-secondary capacitance. This low-  
capacitance transformer design enables an order of  
magnitude reduction in the common-mode current  
injection through the bias transformer. This makes the  
transformer driver an ideal solution for the isolated  
bias supply in various automotive applications to  
minimize the EMI noise caused by the high-speed  
switching devices. The soft-switching feature further  
reduces the EMI noise.  
VIN  
SYNC  
VCC  
DIS/FLT  
VREG  
SW  
VOUT  
GND  
OC/DT  
RT  
Simplified Application  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 

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