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參數資料
| 型號： | HMC920LP5E |
| 廠商： | Hittite Microwave Corporation |
| 文件頁數： | 19/26頁 |
| 文件大小： | 1291K |
| 描述： | IC CTRLR ACTIVE BIAS 32QFN |
| 標準包裝： | 1 |
| 功能： | 有源偏壓控制器 |
| 輸入電壓： | 5 V ~ 16.5 V |
| 電流 - 輸出： | 500mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 32-QFN（5x5） |
| 包裝： | 標準包裝 |
| 其它名稱： | 1127-1077-6 |
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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13
HMC920LP5E
v07.1013
ACTIVE BIAS CONTROLLER
Over/Under Current Alarm
The HMC920LP5E provides over and under current alarm indicator CURALM (pin#8) signal. The CURALM is pulled
up to VDIG when the IDRAIN current exceeds ?25% of IDRAIN regulation target value.
The condition of CURALM signal does not effect the operation of HMC920LP5E, it is provided only for monitoring
purposes.
The CURALM signal is activated if the low and high current duration is longer than a certain threshold. This duration
can be adjusted through the external resistor R26 with equation 5. Figure-2 presents a behavioral sketch how the
CURALM indicator signal acts under various IDRAIN conditions.
T
wait
= R26x5.1x10
-4
+3
where T
wait
is in micro seconds. Changing R26 from 10 kOhms to 10 Megohms, T
wait
can be adjusted from 8.1 usec
to 51 msec.
Power Dissipated on HMC920LP5E
vs. IDRAIN Over Vdd
Short Circuit Protection
The pass transistor in every LDO is in series with the load, and a large amount of current will flow through the regulator
during a short condition when no precaution circuitry is included in the system. The HMC920LP5E limits the current
through the pass transistor to less than 900 mA, and this current limit acts as the secondary short circuit protection
to the power foldback feature. During a VDRAIN-GND short circuit HMC920LP5E also pulls down the VGATE to the
lowest voltage supply VNEG, and disables the external amplifier completely for safety.
HMC920LP5E continuously checks the following pins for short conditions and disables the system when a short to
ground is detected.
-LDOCC
-VDRAIN
-VNEGIN (in depletion mode)
-FIXBIAS
0
1
2
3
4
5
0
100
200
300
400
500
600
700
800
Vdd = 6V
Vdd = 9V
Vdd = 12V
Vdd = 15V
IDRAIN (mA)
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相關代理商/技術參數 |
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|---|---|
| HMC920LP5ETR | 制造商:Hittite Microwave Corp 功能描述:IC CTRLR ACTIVE BIAS 32QFN |
| HMC921LP4E | 功能描述:IC AMP MMIC GASS 24QFN RoHS:是 類別:RF/IF 和 RFID >> RF 放大器 系列:- 標準包裝:3,000 系列:- 頻率:100MHz ~ 6GHz P1dB:9.14dBm（8.2mW） 增益:15.7dB 噪音數據:1.3dB RF 型:CDMA，TDMA，PCS 電源電壓:2.7 V ~ 5 V 電流 - 電源:60mA 測試頻率:2GHz 封裝/外殼:0505（1412 公制） 包裝:帶卷 (TR) |
| HMC921LP4ETR | 制造商:Hittite Microwave Corp 功能描述:IC AMP MMIC GASS 24QFN |
| HMC922LP4E | 制造商:Hittite Microwave Corp 功能描述:IC MMIC SWITCH SPDT DIFF 24-QFN |
| HMC922LP4ETR | 制造商:Hittite Microwave Corp 功能描述:HMC922 Series DC - 4.0 GHz Non-Reflective Differential SPDT Switch - QFN-24 |
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