参数资料
型号: TPS53124RGET
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: DUAL SWITCHING CONTROLLER, PQCC24
封装: GREEN, PLASTIC, QFN-24
文件页数: 19/22页
文件大小: 656K
代理商: TPS53124RGET
DEVICE INFORMATION
SLUS825B – FEBRUARY 2008 – REVISED MAY 2008 ..................................................................................................................................................... www.ti.com
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
GFN24
TSSOP28
Supply input for high-side NFET driver (boost terminal). Connect
VBST1,
capacitor from this pin to respective LL terminals. An internal PN diode is
23, 8
1, 14
I
VBST2
connected between VREG5 to each of these pins. User can add external
schottky diode if forward drop is critical to drive the NFET.
EN1, EN2
24, 7
3, 12
I
Channel 1 and Channel 2 enable pins.
Output connections to SMPS. These terminals serve ON-time adjustment,
VO1, VO2
1, 6
4, 11
I
output discharge.
VFB1, VFB2
2, 5
5, 10
I
SMPS feedback inputs. Connect with feedback resistor divider.
GND
3
7
I
Signal ground pin.
High-side NFET driver outputs. LL referenced floating drivers. The gate
DRVH1,
22, 9
28, 15
O
drive voltage is defined by the voltage across VBST to LL node flying
DRVH2
capacitor.
Switch-node connections for high-side drivers. Also serve as input to
LL1, LL2
21, 10
27, 16
I/O
current comparators.
DRVL1,
Synchronous NFET driver outputs. PGND referenced drivers. The gate
20, 11
26, 17
O
DRVL2
drive voltage is defined by VREG5 voltage.
Ground returns for DRVL1 and DRVL2. Also serve as input of current
PGND1,
19, 12
25, 18
I/O
comparators. Connect PGND1, PGND2 and GND strongly together near
PGND2
the device.
Over-current trip point set input. Connect resistor from this pin to GND to
TRIP1,
set threshold for synchronous RDS(on) sense. Voltage across this pin and
18, 13
24, 19
I
TRIP2
GND is compared to voltage across PGND and LL at over current
comparator.
VIN
17
23
I
Supply Input for 5-V linear regulator.
5-V supply input for the entire control circuit except the NFET drivers.
V5FILT
15
21
I
Connect capacitor (typical 1
F) from GND to V5FILT. V5FILT is
connected to VREG5 via internal resistor.
5-V power supply output. VREG5 is connected to V5FILT via internal
VREG5
16
20
O
resistor.
TEST1,
4, 14
8, 20
I/O
Used for test only. Pin should be connected to GND
TEST2
6
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS53124
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