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参数资料
| 型号： | TPS51727RHARG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封装： | 6 X 6 MM, GREEN, PLASTIC, QFN-40 |
| 文件页数： | 42/42页 |
| 文件大小： | 0K |
| 代理商： | TPS51727RHARG4 |
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www.ti.com ..................................................................................................................................................... SLUS806B – APRIL 2008 – REVISED JANUARY 2009
TERMINAL FUNCTIONS (continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
OSRSEL
38
I
Overshoot reduction (OSR) setting. The OSR threshold can be selected or OSR can be disabled.
PAD
-
Thermal pad; Connect directly to system GND plane with multiple vias.
PCNT
13
I
Phase control input. 0.5-V threshold logic. High is dual phase mode.
PD1
12
I
Test pin. Tie to GND.
PD2
15
PGOOD
31
O
Open-drain PWRGD output.
PGND
25
-
Synchronous N-channel MOSFET gate drive return.
PMON
35
O
Power monitor output. VPMON = VOUT × ΣVISENSE × K. See applications section for more detail.
SLP
32
I
Sleep mode control. 3.3-V I/O Level; disallows switching when entering sleep mode.
THAL
11
O
Thermal alarm; open drain output, Active low. 1-ms de-glitch filter.
Thermal sensor input. An internal 60-
A current source flows into an NTC thermistor connected to GND. The
THRM
10
I/O
voltage threshold is 0.75-V. Also is a ‘Faults off’ input, (VTHRM = VV5FILT) for debug mode.
On-time selection pin. The operating frequency can be set between 200-kHz and 500-kHz in 100-kHz steps.
TONSEL
37
I
Frequency can be changed during operation.
Overcurrent protection (OCP) setting. The valley current limit at the CS inputs can be selected in a range
TRIPSEL
36
I
between approximately 10-mV to 20-mV.
V5IN
26
I
5-V power input for drivers; bypass to PGND with
≥ 1
F ceramic capacitor.
5-V power input for control circuitry. Has internal, 3-
Ω resistor to 5VFILT. Bypass to GND with ≥ 1-F
V5FILT
40
I
ceramic capacitor.
VBST1
22
I
Top N-channel MOSFET bootstrap voltage inputs.
VBST2
29
Voltage sense line tied directly to VOUT. Tie to VOUT with a 100-
Ω resistor to close feedback when voltage
VFB
9
I
sensing through a socket.
VID0
20
VID1
19
VID2
18
I
DAC programming bits most significant bit (MSB) to least significant bit (LSB). 0.5-V threshold logic.
VID3
17
VID4
16
VREF
2
O
1.7-V, 250-
A voltage reference. Bypass to GND with a 0.22-F ceramic capacitor.
Copyright 2008–2009, Texas Instruments Incorporated
9
Product Folder Link(s): TPS51727
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