UC3909N Datasheet

IC型號：
UC3909N
PDF描述：
IC-LEAD ACID BATT-CHARGER
文件大小：
335.93KB
PDF頁數(shù)：
8頁
芯片廠家：
ETC

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UC2909

UC3909

Switchmode Lead-Acid Battery Charger

FEATURES

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Accurate and Efficient Control of

Battery Charging

Average Current Mode Control

from Trickle to Overcharge

Resistor Programmable Charge

Currents

Thermistor Interface Tracks

Battery Requirements Over

Temperature

Output Status Bits Report on Four

Internal Charge States

Undervoltage Lockout Monitors

VCC and VREF

DESCRIPTION

The UC3909 family of Switchmode Lead-Acid Battery Chargers accurately

controls lead acid battery charging with a highly efficient average current

mode control loop. This chip combines charge state logic with average cur-

rent PWM control circuitry. Charge state logic commands current or volt-

age control depending on the charge state. The chip includes undervolt-

age lockout circuitry to insure sufficient supply voltage is present before

output switching starts. Additional circuit blocks include a differential cur-

rent sense amplifier, a 1.5% voltage reference, a -3.9mV/擄C thermistor lin-

earization circuit, voltage and current error amplifiers, a PWM oscillator, a

PWM comparator, a PWM latch, charge state decode bits, and a 100mA

open collector output driver.

鈥?/div>

BLOCK DIAGRAM

Pin numbers refer to DIL-20 packages.

4/97

UDG-95007-1

標準包裝
20
類別
集成電路 (IC)
家庭
PMIC - 電池管理
系列
-
功能
充電管理
電池化學
鉛酸
電源電壓
8.8 V ~ 35 V
工作溫度
0°C ~ 70°C
安裝類型
通孔
封裝/外殼
20-DIP（0.300"，7.62mm）
供應商設備封裝
20-PDIP
包裝
管件
其它名稱
296-2232-5

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