BridgeSwitch-2 Family
High-Voltage, Self-Powered, Half-bridge Motor Driver with
Integrated Device Protection and System Monitoring
HV+
Product Highlights
HD
Highest Performance and Design Flexibility
• Fully integrated half-bridge stage with up to 99% efficiency
• Eliminates external heat sink at rated continuous RMS current
• 600 V N-channel power FREDFETs
VDD
HS
BPH
Drive
XH
HB
SM
EF
SLP
/INH
INL
IPH
• Ultra-soft, fast recovery diode
LS
Drive
&
System
MCU
• Accurate instantaneous phase current information output (IPH)
• Eliminates external sensing and amplification circuitry
• Self-biased low-side and high-side drivers
Control
BPL
BridgeSwitch-2
SG
XL
LS
• Eliminates need for auxiliary power supply
• Small footprint surface mount InSOP-24C package
• Exposed pads enable heat sinking through PCB
HV-
PI-9532-052824
• Controlled FREDFET switching speed reduces EMI
• Below 4 mW power consumption from a 325 VDC bus in Sleep Mode
when self-supplied
Figure 1. Typical 3-Phase Inverter Schematic (BRD246X).
• Error Flag (EF) provides warning of severe system and device faults
Enhanced Safety and Reliability Features
• Adjustable cycle-by-cycle current limit for both FREDFETs
• Fail-safe operation
Figure 2. InSOP-24C Package.
• Internal dual level thermal overload protection
• Self-configuring system level monitoring input
• Four level DC bus undervoltage
• DC bus overvoltage
• System temperature
Product Family
FREDFET DC
Continuous Phase
RMS Current2
Product3
Output Current1
• Adaptive dead time
BRD2x60C
BRD2x61C
BRD2x63C
BRD2x65C
BRD2x67C
1.0 A
1.7 A
3.0 A
5.5 A
11.5 A
0.22 A
0.50 A
0.75 A
1.00 A
1.33 A
• Simultaneous conduction lockout protection
• Selectable latching or hysteretic over-temperature and sustained
over-current protection
Status Interface (FAULT)
• Bi-directional bussed open Drain single wire interface
• Reports status updates to system MCU
• Successful power-up
Table 1.
Notes:
Phase Output Current Family Table.
1. Continuous DC output current per FREDFET, calculated at 25 °C case and
125 °C junction temperature. Normally limited by internal circuitry.
2. Continuous phase RMS current, internal self-supply, 340 V bus, trapezoidal
commutation with 10 kHz high-side PWM, PCB heat sinking with 50 °C case
temperature rise.
• Internal over-current or temperature faults
• System level faults
• Includes device identification
• Status query through system MCU
• Device fault reset through system MCU
3. Package. C: InSOP-24C.
Applications
Product Family
BRD216x
Reporting
FAULT & ID
FAULT & ID
EF
IPH Current Information
• 1 or 3-phase high-voltage PM and BLDC motor drives
• Appliances including dish washers, refrigerators and ceiling fans
• Fans in high efficiency air conditioners
• Circulation pumps
-
BRD226x
Yes
-
BRD236x
Description
BRD246x
EF
Yes
The BridgeSwitch™-2 family of integrated half-bridges dramatically
simplifies the development and production of high-voltage inverter
driven 1 or 3-phase PM or BLDC motor drives. It incorporates two
high-voltage N-channel power FREDFETs with low and high-side drivers
in a single small-outline package. The internal power FREDFETs offer
ultra-soft and ultrafast diodes ideally suited for hard switched inverter
drives. Both drivers are self-supplied eliminating the need for an
external auxiliary power supply. BridgeSwitch-2 provides a unique
instantaneous phase current output signal simplifying implementation of
sensor-less control schemes. The low-profile, compact footprint surface
mount package offers extended creepage distances and allows heat
sinking of both power FREDFETs through the printed circuit board.
Table 2.
Product Family Functional Overview.
BridgeSwitch-2 offers internal fault protection functions and external
system level monitoring. Internal fault protection includes cycle-by-
cycle current limit for both FREDFETs and two level thermal overload
protection. External system level monitoring includes DC bus sensing
with four undervoltage levels and one overvoltage level as well as
driving external sensors such as an NTC. The bi-directional bussed
single wire status interface reports observed status changes. The new
Sleep Mode reduces per device consumption to less than 4 mW from a
rectified AC mains bus when using self-supplied operation.
www.power.com
July 2024
This Product is Covered by Patents and/or Pending Patent Applications.
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