Datasheet BridgeSwitch Family (Power Integrations) - 4

BridgeSwitch Pin Functional Description HIGH-SIDE DRAIN (HD) Exposed Pad
The HD exposed pad is the electrical connection to the high-side power FREDFET Drain connection. It is also the input for the internal low-side and high-side self-supply circuitry.
LS 24 1 XL EXTERNAL CURRENT LIMIT LOW-SIDE (XL) Pin (Pin 1) 2 IPH (NC)
This pin connects to a resistor to set the cycle-by-cycle current limit
HB 3 SG 4 BPL
for the low-side power FREDFET.
5 INL PHASE CURRENT OUTPUT (IPH) Pin (Pin 2, BRD126X) 6 /INH
This pin connects to a small signal resistor and provides low-side
HB 16-19 7 FAULT 8 SM
FREDFET Drain current information. The pin should be left floating if
9 NC
the function is not used. Function is not available with BRD116X.
NC 15 10 SG BPH 14 HD 11 ID SIGNAL GROUND (SG) Pin (Pins 3 and 10) XH 13 12 NC
These pins are the ground reference connection for low-side control er small signal pins and the system micro-control er.
BYPASS LOW-SIDE (BPL) Pin (Pin 4)
This pin connects to the external bypass capacitor for the low-side PI-8292-120117 control er and FREDFET Gate driver. Figure 5. Pin Configuration (Bottom View).
CONTROL INPUT LOW-SIDE (INL) Pin (Pin 5)
Active high logic level control input for the low-side power FREDFET.
EXTERNAL CURRENT LIMIT HIGH-SIDE (XH) Pin (Pin 13) CONTROL INPUT HIGH-SIDE (/INH) Pin (Pin 6)
This pin connects to a resistor to set the cycle-by-cycle current limit for the high-side power FREDFET. The resistor is referenced to HALF Active low logic level control input for the high-side power FREDFET. BRIDGE CONNECTION.
STATUS COMMUNICATION (FAULT) Pin (Pin 7) BYPASS HIGH-SIDE (BPH) Pin (Pin 14)
This open Drain pin connects to an I/O port of the system micro- This pin connects to the external bypass capacitor for the high-side control er to provide a status update. The pin should be connected to FREDFET Gate driver. The capacitor is referenced to HALF BRIDGE SIGNAL GROUND if the function is not used. CONNECTION.
SYSTEM MONITOR (SM) Pin (Pin 8) HALF-BRIDGE CONNECTION (HB) (Pin 16-19)
This pin is a self-configuring system monitor input. It configures This pin connects to the Source of the high-side power FREDFET and itself into a high-voltage bus sense input if a resistor is connected to to the Drain of the low-side power FREDFET. It is also the reference the high-voltage bus at power-up. It configures itself into an external for the BYPASS HIGH-SIDE and the EXTERNAL CURRENT LIMIT temperature sense input if a resistance is connected to SYSTEM HIGH-SIDE pins. GROUND at power-up. The pin should be connected to SIGNAL GROUND if the function is not used.
LOW-SIDE SOURCE (LS) (Pin 24) DEVICE ID (ID) Pin (11)
This pin is the low-side power FREDFET Source connection. It connects to the SIGNAL GROUND through a Kelvin connection. This pin programs the device ID at power-up.
NOT CONNECTED (NC) Pins (Pins 2 (BRD116X only) 9, 12, 15)
This pin is not connected and should be left floating. Pin 2 only applies to BRD116X.
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Rev. F 11/18 www.power.com Document Outline Product Highlights Description Output Power Table Pin Functional Description BridgeSwitch Functional Description Application Example PCB Design Guidelines Absolute Maximum Ratings Thermal Resistance Key Electrical Characteristics Typical Performance Characteristics inSOP-24C Package Drawing Package Marking Part Ordering and MSL Table ESD and Latch-Up Table Part Ordering Information