- 鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛�璨疯常IC缍�(w菐ng) > PDF鐩寗5881 > LT1621IGN#TRPBF (Linear Technology)IC AMP R-R CURRENT SENSE 16-SSOP PDF璩囨枡涓嬭級
鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉(h脿o)锛� | LT1621IGN#TRPBF |
| 寤犲晢锛� | Linear Technology |
| 鏂囦欢闋佹暩(sh霉)锛� | 7/12闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC AMP R-R CURRENT SENSE 16-SSOP |
| 妯�(bi膩o)婧�(zh菙n)鍖呰锛� | 2,500 |
| 鏀惧ぇ鍣ㄩ鍨嬶細 | 闆绘祦妾㈡脯(c猫) |
| 闆昏矾鏁�(sh霉)锛� | 2 |
| 杓稿嚭椤炲瀷锛� | 婊挎摵骞� |
| 闆绘祦 - 杓稿叆鍋忓锛� | 20nA |
| 闆诲 - 杓稿叆鍋忕Щ锛� | 6000µV |
| 闆绘祦 - 闆绘簮锛� | 2.3mA |
| 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±)锛� | 4.5 V ~ 5.5 V |
| 宸ヤ綔婧害锛� | -40°C ~ 85°C |
| 瀹夎椤炲瀷锛� | 琛ㄩ潰璨艰 |
| 灏佽/澶栨锛� | 16-SSOP锛�0.154"锛�3.90mm 瀵級 |
| 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 | 16-SSOP |
| 鍖呰锛� | 甯跺嵎 (TR) |
4
LT1620/LT1621
PI FU CTIO S
U
UU
input (across external sense resistor) equal to (VCC 鈥�
VPROG)/10. Input voltage range is VCC to (VCC 鈥� 1.25V).
AVG2: Sense Amplifier AV = 鈥� 20 Output and Comparator
Positive Input. Used as integration node for end-of-cycle
determination flag. Integration time constant is calculated
using 5k
typical output impedance.
PROG2: Comparator Negative Input. Program node for
end-of-cycle determination typically used during voltage
mode operation. The comparator threshold is reached
when the current sense amplifier differential input voltage
equals (VCC 鈥� VPROG2)/20. Input voltage range is (VCC 鈥�
0.15V) to (VCC 鈥� 2.5V).
GND: Ground Reference.
MODE: Comparator Open Collector Output. Output is logic
low when magnitude of current sense amplifier differential
input voltage is less than (VCC 鈥� VPROG2)/20.
IOUT: Transconductance Amplifier Output. In typical appli-
cation, IOUT sinks current from current-setting node on
companion PWM controller IC, facilitating current mode
loop control.
FUNCTIONAL BLOCK DIAGRA
UU
W
鈥�
+
SENSE
AMPLIFIER
VCC
IN+
IN鈥�
PROG
PROG2*
500
2.5k
鈥�
+
SENSE
AVG
AVG2*
IOUT
MODE*
LT1620/21 FBD
gm
鈥�
+
5k
*AVAILABLE IN THE LT1620GN ONLY
+
鈥�
+
鈥�
SENSE
鈥�
SENSE
+
INTVCC
ITH
PWM
CONTROLLER
END-OF-CYCLE
(ACTIVE LOW)
(
脳1 GAIN)
(
脳10 GAIN)
(
脳20 GAIN)
CURRENT
SENSE
RESISTOR
VID
GND
5V
OPERATION
U
Current Sense Amplifier
The current sense amplifier is a multiple output voltage
amplifier with an operational input common mode range
from 0V to 32V. The amplifier generates scaled output
voltages at the SENSE, AVG and AVG2 (available in
LT1620GN) pins. These output signal voltages are refer-
enced to the VCC supply by pulling signal current through
internal VCC referred resistors.
(Refer to the Functional Block Diagram)
The first output (SENSE) is a unity gain, level-shifted repre-
sentation of the input signal (IN+ 鈥� IN鈥�). In typical PWM/
charger type applications, this output is used to drive the
current sense amplifier of the mated PWM controller IC.
The other two outputs (AVG and AVG2) are internally
connected to a transconductance amplifier and compara-
tor, respectively. The AVG output yields a gain of 10, and
the AVG2 output provides a gain of 20. These pins are
鐩搁棞(gu膩n)PDF璩囨枡 |
PDF鎻忚堪 |
|---|---|
| 77311-401-16LF | BERGSTIK |
| RC0805FR-073R48L | RES 3.48 OHM 1/8W 1% 0805 SMD |
| AD8674ARUZ-REEL | IC OPAMP GP 10MHZ QUAD 14TSSOP |
| 78208-410HLF | CONN HEADER 10POS SGL R/A PCB |
| HVC0805Z1008KET | RES HV 10G OHM 1/8W 10% 0805 |
鐩搁棞(gu膩n)浠ｇ悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
|---|---|
| LT1624IS8 | 鍒堕€犲晢:Linear Technology 鍔熻兘鎻忚堪: |
| LT-1625S | 鍒堕€犲晢:鏈煡寤犲 鍒堕€犲晢鍏ㄧū:鏈煡寤犲 鍔熻兘鎻忚堪:T1/CEPT/ISDN-PRI TRANSFORMER |
| LT1627 | 鍒堕€犲晢:LINER 鍒堕€犲晢鍏ㄧū:Linear Technology 鍔熻兘鎻忚堪:Micropower Low Dropout Regulators with Shutdown |
| LT1629 | 鍒堕€犲晢:EDSYN 鍔熻兘鎻忚堪: |
| LT1630 | 鍒堕€犲晢:LINER 鍒堕€犲晢鍏ㄧū:Linear Technology 鍔熻兘鎻忚堪:30MHz, 10V/us, Dual/Quad Rail-to-Rail Input and Output Precision Op Amps |
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