- 鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛�璨疯常IC缍�(w菐ng) > PDF鐩寗11561 > MAX5945CAX+T (Maxim Integrated Products)IC NETWORK PWR CTRL 36-SSOP PDF璩囨枡涓嬭級
鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉锛� | MAX5945CAX+T |
| 寤犲晢锛� | Maxim Integrated Products |
| 鏂囦欢闋佹暩(sh霉)锛� | 10/44闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC NETWORK PWR CTRL 36-SSOP |
| 鐢�(ch菐n)鍝佸煿瑷撴ā濉婏細 | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 妯欐簴鍖呰锛� | 1,000 |
| 鎺у埗鍣ㄩ鍨嬶細 | 缍�(w菐ng)绲￠浕婧愭帶鍒跺櫒 |
| 鎺ュ彛锛� | I²C |
| 闆绘簮闆诲锛� | 3.3V |
| 闆绘祦 - 闆绘簮锛� | 4.2mA |
| 宸ヤ綔婧害锛� | 0°C ~ 70°C |
| 瀹夎椤炲瀷锛� | 琛ㄩ潰璨艰 |
| 灏佽/澶栨锛� | 36-BSOP锛�0.295"锛�7.50mm 瀵級 |
| 渚涙噳鍟嗚ō鍌欏皝瑁濓細 | 36-SSOP |
| 鍖呰锛� | 甯跺嵎 (TR) |
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MAX5945
The MAX5945 also features three other undervoltage
and overvoltage interrupts: VEE undervoltage interrupt
(VEEUV), VDD undervoltage interrupt (VDDUV), and VDD
overvoltage interrupt (VDDOV). A fault latches into the
supply events register (Table 11) but the MAX5945 does
not shut down the ports with a VEEUV, VDDUV, or VDDOV.
DC Disconnect Monitoring
Setting R13h[DCD_EN_] bits high enable DC load mon-
itoring during a normal powered state. If SENSE_ falls
below the DC load disconnect threshold, VDCTH, for
more than tDISC, the device turns off power and asserts
the LD_DISC_ bit of the corresponding port. tDISC is
programmable using R16h[0-1] and R27h[0-3].
AC Disconnect Monitoring
The MAX5945 features AC load disconnect monitoring.
Connect an external sine wave to OSC_IN. The oscilla-
tor requirements are:
Frequency x VP-P = 200VP-P x Hz 卤15%
Positive peak voltage > +2V
Frequency > 60Hz
A 100Hz 卤10%, 2VP-P 卤5%, with +1.2V offset
(VPEAK = +2.2V, typ) is recommended.
The MAX5945 buffers and amplifies 3x the external
oscillator signal and sends the signal to DET_, where
the sine wave is AC coupled to the output. The
MAX5945 senses the presence of the load by monitor-
ing the amplitude of the AC current returned to DET_
(see the Functional Diagram).
Setting R13h[ACD_EN_] bits high enable AC load dis-
connect monitoring during the normal powered state. If
the AC current peak at the DET_ pin falls below IACTH
for more than tDISC, the device turns off power and
asserts the LD_DISC_ bit of the corresponding port.
IACTH is programmable using R23h[0-3].
An internal comparator checks for a proper amplitude
of the oscillator input. If the positive peak of the input
sinusoid falls below a safety value of 2V, OSC_FAIL
sets and the port shuts down. Power cannot be applied
to the ports when ACD_EN is set high and OSC_FAIL is
set high. Leave OSC_IN unconnected or connect it to
DGND when not using AC disconnect detection.
When using the AC disconnect detection feature, con-
nect AGND directly to DNGD as close as possible to
the IC. The MAX5945 also requires a VDD of greater
than +3V for this function. See the Typical Application
Circuit with AC disconnect for other external compo-
nent requirements.
Thermal Shutdown
If the MAX5945 die temperature reaches +150掳C, an
overtemperature fault generates and the MAX5945
shuts down and the MOSFETs turn off. The die temper-
ature of the MAX5945 must cool down below +130掳C to
remove the overtemperature fault condition. After a
thermal shutdown, the part is reset.
Address Inputs
A3, A2, A1, and A0 represent the four LSBs of the chip
address, the complete 7-bit chip address (see Table 3).
The four LSBs latch on the low-to-high transition of
RESET or after a power-supply start (either on VDD or
VEE). Address inputs default high through an internal
50k pullup resistor to VDD. The MAX5945 also
responds to the call through a global address 60h (see
the Global Addressing and Alert Response Protocol
section).
I2C-Compatible Serial Interface
The MAX5945 operates as a slave that sends and
receives data through an I2C-compatible, 2-wire or 3-
wire interface. The interface uses a serial data input line
(SDAIN), a serial data output line (SDAOUT), and a ser-
ial clock line (SCL) to achieve bidirectional communica-
tion between master(s) and slave(s). A master (typically
a microcontroller) initiates all data transfers to and from
the MAX5945, and generates the SCL clock that syn-
chronizes the data transfer. In most applications, con-
nect the SDAIN and the SDAOUT lines together to form
the serial data line (SDA).
Using the separate input and output data lines allows
optocoupling with the controller bus when an isolated
supply powers the microcontroller.
The MAX5945 SDAIN line operates as an input. The
MAX5945 SDAOUT operates as an open-drain output.
A pullup resistor, typically 4.7k, is required on
SDAOUT. The MAX5945 SCL line operates only as an
input. A pullup resistor, typically 4.7k, is required on
SCL if there are multiple masters, or if the master in a
single-master system has an open-drain SCL output.
Serial Addressing
Each transmission consists of a START condition (Figure
7) sent by a master, followed by the MAX5945 7-bit slave
address plus R/W bit, a register address byte, one or
more data bytes, and finally a STOP condition.
Quad Network Power Controller
for Power-Over-LAN
18
______________________________________________________________________________________
010
A3
A2
A1
A0
R/W
Table 3. MAX5945 Address
鐩搁棞PDF璩囨枡 |
PDF鎻忚堪 |
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| VE-253-IX-S | CONVERTER MOD DC/DC 24V 75W |
| VE-2TX-IX-S | CONVERTER MOD DC/DC 5.2V 75W |
| VE-2TV-IX-S | CONVERTER MOD DC/DC 5.8V 75W |
| PIC16LF1783-E/ML | IC MCU 8BIT 7KB FLASH 28-QFN |
| PIC16LF1782-E/SP | IC MCU 8BIT 3.5KB FLASH 28-SPDIP |
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鍙冩暩(sh霉)鎻忚堪 |
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| MAX5945EAX | 鍔熻兘鎻忚堪:鐔辨彃鎷斿姛鐜囧垎甯� RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鐢�(ch菐n)鍝�:Controllers & Switches 闆绘祦闄愬埗: 闆绘簮闆诲-鏈€澶�:7 V 闆绘簮闆诲-鏈€灏�:- 0.3 V 宸ヤ綔婧害鑼冨湇: 鍔熺巼鑰楁暎: 瀹夎棰ㄦ牸:SMD/SMT 灏佽 / 绠遍珨:MSOP-8 灏佽:Tube |
| MAX5945EAX+ | 鍔熻兘鎻忚堪:鐔辨彃鎷斿姛鐜囧垎甯� IEEE 802.3af Quad Net Pwr Controller RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鐢�(ch菐n)鍝�:Controllers & Switches 闆绘祦闄愬埗: 闆绘簮闆诲-鏈€澶�:7 V 闆绘簮闆诲-鏈€灏�:- 0.3 V 宸ヤ綔婧害鑼冨湇: 鍔熺巼鑰楁暎: 瀹夎棰ㄦ牸:SMD/SMT 灏佽 / 绠遍珨:MSOP-8 灏佽:Tube |
| MAX5945EAX+T | 鍔熻兘鎻忚堪:鐔辨彃鎷斿姛鐜囧垎甯� IEEE 802.3af Quad Net Pwr Controller RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鐢�(ch菐n)鍝�:Controllers & Switches 闆绘祦闄愬埗: 闆绘簮闆诲-鏈€澶�:7 V 闆绘簮闆诲-鏈€灏�:- 0.3 V 宸ヤ綔婧害鑼冨湇: 鍔熺巼鑰楁暎: 瀹夎棰ㄦ牸:SMD/SMT 灏佽 / 绠遍珨:MSOP-8 灏佽:Tube |
| MAX5945EAX-T | 鍔熻兘鎻忚堪:鐔辨彃鎷斿姛鐜囧垎甯� RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鐢�(ch菐n)鍝�:Controllers & Switches 闆绘祦闄愬埗: 闆绘簮闆诲-鏈€澶�:7 V 闆绘簮闆诲-鏈€灏�:- 0.3 V 宸ヤ綔婧害鑼冨湇: 鍔熺巼鑰楁暎: 瀹夎棰ㄦ牸:SMD/SMT 灏佽 / 绠遍珨:MSOP-8 灏佽:Tube |
| MAX5945EVKIT | 鍔熻兘鎻忚堪:闆绘簮绠＄悊IC闁嬬櫦(f膩)宸ュ叿 Evaluation Kit/Evaluation System for the MAX5945 RoHS:鍚� 鍒堕€犲晢:Maxim Integrated 鐢�(ch菐n)鍝�:Evaluation Kits 椤炲瀷:Battery Management 宸ュ叿鐢ㄤ簬瑭曚及:MAX17710GB 杓稿叆闆诲: 杓稿嚭闆诲:1.8 V |
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