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参数资料
| 型号： | TPS23756PWP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.1 A SWITCHING CONTROLLER, 278 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 39/41页 |
| 文件大小： | 1405K |
| 代理商： | TPS23756PWP |
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PAD=V
SS
N/C=LeavePinUnused
TPS23754-1
1
2
3
4
5
6
7
15
14
13
11
12
8
16
V
DD
DEN
DT
FRS
CLS
GATE
RTN
V
C
CS
V
SS
V
B
CTL
T2P
BLNK
GAT2
10
9
19
18
17
20
PAD=V
SS
APD
ARTN
COM
TPS23754/6
PPD
V
DD1
1
2
3
4
5
6
7
15
14
13
11
12
8
16
V
DD
DEN
DT
FRS
CLS
GATE
RTN
V
C
CS
V
SS
V
B
CTL
T2P
BLNK
GAT2
10
9
19
18
17
20
APD
ARTN
COM
N/C
V
DD1
TPS23754
TPS23754-1
TPS23756
www.ti.com
SLVS885D – OCTOBER 2008 – REVISED DECEMBER 2009
(TOP VIEW)
PIN FUNCTIONS
NO.
NAME
TYPE
DESCRIPTION
'754/6
‘754-1
CTL
1
I
The control loop input to the PWM (pulse width modulator), typically driven by output regulation
feedback (e.g. optocoupler). Use VB as a pullup for CTL.
VB
2
O
5.1 V bias rail for dc/dc control circuits and the feedback optocoupler. Typically bypass with a 0.1
μF
to ARTN.
CS
3
I/O
COM
4
Gate driver return, connect to ARTN and RTN.
GATE
5
O
Gate drive output for the main dc/dc converter switching MOSFET.
VC
6
I/O
DC/DC converter bias voltage. Connect a 0.47
μF (minimum) ceramic capacitor to ARTN at the pin,
and a larger capacitor to power startup.
GAT2
7
O
Gate drive output for a second dc/dc converter switching MOSFET (see Figure 1).
ARTN
8
ARTN is the dc/dc converter analog return. Tie to RTN and COM on the circuit board.
RTN
9
RTN is the output of the PoE hotswap MOSFET.
VSS
10
Connect to the negative power rail derived from the PoE source.
VDD1
11
I
Source of dc/dc converter startup current. Connect to VDD for many applications.
VDD
12
I
Connect to the positive PoE input power rail. VDD powers the PoE interface circuits. Bypass with a
0.1
μF capacitor and protect with a TVS.
DEN
13
I/O
Connect a 24.9 k
resistor from DEN to VDD to provide the PoE detection signature. Pulling this pin
to VSS during powered operation causes the internal hotswap MOSFET to turn off.
NC
–
14
Float this no-connect pin.
PPD
14
–
I
Raising VPPD-VSS above 1.55 V enables the hotswap MOSFET and activates T2P. Connecting PPD
to VDD enables classification when APD is active. Tie PPD to VSS or float when not used.
CLS
15
I
Connect a resistor from CLS to VSS to program classification current. 2.5 V is applied to the program
resistor during classification to set class current.
DT
16
I
Connect a resistor from DT to ARTN to set the GATE to GAT2 dead time. Tie DT to VB to disable
GAT2 operation.
APD
17
I
Raising VAPD-VARTN above 1.5 V disables the internal hotswap switch, turns class off, and forces T2P
active. This forces power to come from a external VDD1-RTN adapter. Tie APD to ARTN when not
used.
BLNK
18
I
Connect to ARTN to utilize the internally set current-sense blanking period, or connect a resistor from
BLNK to ARTN to program a more accurate period.
FRS
19
I
Connect a resistor from FRS to ARTN to program the converter switching frequency. FRS may be
used to synchronize the converter to an external timing source.
T2P
20
O
Active low output that indicates a PSE has performed the IEEE 802.3at type 2 hardware
classification, PPD is active, or APD is active.
Pad
–
Connect to VSS.
Copyright 2008–2009, Texas Instruments Incorporated
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS23756PWPR | 功能描述:热插拔功率分布 Hi Pwr Eff PoE Inter face & DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS23757EVM | 功能描述:电源管理IC开发工具 TPS23757 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS23757PW | 功能描述:热插拔功率分布 Hi Eff PoE Inter & DC/DC Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS23757PWR | 功能描述:热插拔功率分布 Hi Eff PoE Interface & DC/DC Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2375D | 功能描述:热插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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