LMG1205 Datasheet, PDF (3/24 Pages) Texas Instruments – 100-V, 1.2-A, 5-A, Half-Bridge Gate Driver for Enhancement Mode GaN FETs

www.ti.com
5 Pin Configuration and Functions
YFX Package
12-Pin DSBGA
Top View
LMG1205
SNOSD37 – MARCH 2017
A ^LOL
VSS
VDD
LI
B ^LOH
HI
C ^HS
VDD
D ^HOL
HOH
HB
HS
1
2
3
4
NUMBER
A1
A2
A3, C4⁽²⁾
A4
B1
B4
C1, D4⁽²⁾
D1
D2
D3
PIN
NAME
LOL
VSS
VDD
LI
LOH
HI
HS
HOL
HOH
HB
TYPE ⁽¹⁾
Pin Functions
DESCRIPTION
O
Low-side gate driver sink-current output: connect to the gate of the low-side GaN FET with
a short, low inductance path. A gate resistor can be used to adjust the turnoff speed.
G Ground return: all signals are referenced to this ground.
P
5-V positive gate drive supply: locally decouple to VSS using low ESR/ESL capacitor
located as close as possible to the IC.
I
Low-side driver control input. The LMG1205 inputs have TTL type thresholds. Unused
inputs must be tied to ground and not left open.
O
Low-side gate driver source-current output: connect to the gate of high-side GaN FET with
a short, low inductance path. A gate resistor can be used to adjust the turnon speed.
I
High-side driver control input. The LMG1205 inputs have TTL type thresholds. Unused
inputs must be tied to ground and not left open.
P
High-side GaN FET source connection: connect to the bootstrap capacitor negative
terminal and the source of the high-side GaN FET.
O
High-side gate driver turnoff output: connect to the gate of high-side GaN FET with a short,
low inductance path. A gate resistor can be used to adjust the turnoff speed.
O
High-side gate driver turnon output: connect to the gate of high-side GaN FET with a short,
low inductance path. A gate resistor can be used to adjust the turnon speed.
High-side gate driver bootstrap rail: connect the positive terminal of the bootstrap capacitor
P to HB and the negative terminal to HS. The bootstrap capacitor must be placed as close
as possible to the IC.
(1) I = Input, O = Output, G = Ground, P = Power
(2) A3 and C4, C1 and D4 are internally connected
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: LMG1205
Submit Documentation Feedback
3