General Description The MAX4373 MAX4374 MAX4375 low cost micropow er high side current sense supervisors contain a high side current sense amplifier bandgap reference and comparator with latching output They feature a voltage output that eliminates the need for gain setting resistors making them ideal for today's notebook computers cell phones and other systems where battery DC current monitoring is critical High side current monitoring is especially useful in battery powered systems since it does not interfere with the ground path of the battery charger The to +28V input common mode range is independent of the supply voltage which ensures that the current sense feedback remains viable even when connected to a battery pack in deep discharge The comparator output of the MAX4373 MAX4374 MAX4375 is latched to provide a turn off flag that doesn't oscillate In addition the MAX4374 MAX4375 contain a second comparator for use in window detec tion functions The MAX4373 MAX4374 MAX4375 are available in three different gain versions T +20V V F +50V V H +100V V and use an external sense resistor to set the sensitivity of the input voltage to the load current These features offer a high level of inte gration resulting in a simple and compact current sense solution The MAX4373 MAX4374 MAX4375 operate from a sin gle 7V to +28V supply and consume A They are specified for the extended operating temperature range 40°C to +85°C and are available in pin and pin MAX packages

Maria

Description

Niveau: Supérieur, Doctorat, Bac+8
General Description The MAX4373/MAX4374/MAX4375 low-cost, micropow- er, high-side current-sense supervisors contain a high- side current-sense amplifier, bandgap reference, and comparator with latching output. They feature a voltage output that eliminates the need for gain-setting resistors, making them ideal for today's notebook computers, cell phones, and other systems where battery/DC current monitoring is critical. High-side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the battery charger. The 0 to +28V input common-mode range is independent of the supply voltage, which ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge. The comparator output of the MAX4373/MAX4374/ MAX4375 is latched to provide a turn-off flag that doesn't oscillate. In addition, the MAX4374/MAX4375 contain a second comparator for use in window-detec- tion functions. The MAX4373/MAX4374/MAX4375 are available in three different gain versions (T = +20V/V, F = +50V/V, H = +100V/V) and use an external sense resistor to set the sensitivity of the input voltage to the load current. These features offer a high level of inte- gration, resulting in a simple and compact current- sense solution.

• output ?


• input bias


• supply voltage


• mv


• high-side current-sense


• full-scale sense

Informations

• Publié par: profil-zyak-2012
• Nombre de lectures: 19
• Langue: English

Extrait

19-1630; Rev 2; 10/03

Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs General Description Features The MAX4373/MAX4374/MAX4375 low-cost, micropow- ♦ Current-Sense Amplifier plus Internal Comparator er, high-side current-sense supervisors contain a high- side current-sense amplifier, bandgap reference, and ♦ 5 a 0 n µ d  A B  S an u d p g pl a y p     C Reference with Improved Accuracy comparator with latching output. They feature a voltage urrent output that eliminates the need for gain-setting resistors, making them ideal for today’s notebook computers, cell ♦ ♦ 1 Si m n V g   l ( e m  + a 2 x . ) 7  I V n  t p o u   t +   2 O 8 ff V O   p V e o r l ating Supply phones, and other systems where battery/DC current set tage monitoring is critical. High-side current monitoring is especially useful in battery-powered systems since it ♦ 2% (max) Full-Scale Accuracy does not interfere with the ground path of the battery ♦ Internal Bandgap Reference (±1.6% Accuracy) charger. The 0 to +28V input common-mode range is independent of the supply voltage, which ensures that ♦ Latching Comparator Output the current-sense feedback remains viable even when ♦ Three Gain Versions Available (+20V/V, +50V/V, connected to a battery pack in deep discharge. +100V/V) The comparator output of the MAX4373/MAX4374/ ♦ ommon-Mode Ran e MAX4375 is latched to provide a turn-off flag that Wide 0 to +28V C g , doesn’t oscillate. In addition, the MAX4374/MAX4375 Independent of Supply Voltage contain a second comparator for use in window-detec- ti n tion functions. The MAX4373/MAX4374/MAX4375 are Ordering Informa o available in three different gain versions (T = +20V/V, PARTTEMPRANGE PIN- ( G V A / I V N ) F = +50V/V, H = +100V/V) and use an external sense PACKAGE resistor to set the sensitivity of the input voltage to the MAX4373 TEUA -40 ° C to +85 ° C 8 µMAX +20 load current. These features offer a high level of inte- gration, resulting in a simple and compact current- MAX4373TESA -40 ° C to +85 ° C 8 SO +20 sense solution. MAX4373FEUA -40 ° C to +85 ° C 8 µMAX +50 The MAX4373/MAX4374/MAX4375 operate from a sin- MAX4373FESA -40 ° C to +85 ° C 8 SO +50 gle +2.7V to +28V supply and consume 50µA. They are MAX4373HEUA -40 ° C to +85 ° C 8 µMAX +100 specified for the extended operating temperature range MAX4373HESA -40 ° C to +85 ° C 8 SO +100 (-40°C to +85°C) and are available in 8-pin and 10-pin µMAX packages. Ordering Information continued at end of data sheet. Applications Typical  Operating Circuit Notebook Computers I Portable/Battery-Powered Systems V IN = 0 TO 28V  + V SENSE - LOAD Smart Battery Packs/Chargers R SENSE Cell Phones RS+ RS-  LOAD/ Power-Management Systems V CC = 2.7V TO 28V  V CC BATTERY General-System/Board-Level Current Monitoring C1 Precision Current Sources 0.1 µ F MAX4373 OUT V PULL-UP (UP TO 5V)  R1 R3 COUT CIN RESET R2 GND

Pin Configurations appear at end of data sheet.

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