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參數(shù)資料
| 型號： | LTC4010CFE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| 中文描述： | BATTERY CHARGE CONTROLLER, 615 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, LEAD FREE, EXPOSED PAD, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大小： | 212K |
| 代理商： | LTC4010CFE#PBF |
14
LTC4010
4010fa
error amplifier is a scaled control current for the input of
the PWM comparator CC. The ITH R3 product sets a peak
current threshold for CC such that the desired average
current through RSENSE is maintained. The current com-
parator output does this by switching the state of the SR
latch at the appropriate time.
At the beginning of each oscillator cycle, the PWM clock
sets the SR latch and the external P-channel MOSFET is
switched on (N-channel MOSFET switched off) to refresh
the current carried by the external inductor. The inductor
current and voltage drop across RSENSE begin to rise
linearly. During normal operation, the PFET is turned off
(NFET on) during the cycle by CC when the voltage
difference across RSENSE reaches the peak value set by
the output of EA. The inductor current then ramps down
linearly until the next rising PWM clock edge. This closes
the loop and maintains the desired average charge current
in the external inductor.
Low Dropout Charging
After charging is initiated, the LTC4010 does not require
that VCC remain at least 500mV above BAT because
situations exist where low dropout charging might occur.
In one instance, parasitic series resistance may limit PWM
headroom (between VCC and BAT) as 100% charge is
reached. A second case can arise when the DC adapter
selected by the end user is not capable of delivering the
current programmed by RSENSE, causing the output volt-
age of the adapter to collapse. While in low dropout, the
LTC4010 PWM runs near 100% duty cycle with a fre-
quency that may not be constant and can be less than
550kHz. The charge current will drop below the pro-
grammed value to avoid generating audible noise, so the
actual charge delivered to the battery may depend prima-
rily on the LTC4010 charge timer.
Internal Die Temperature
The LTC4010 provides internal overtemperature detec-
tion to protect against electrical overstress, primarily at
the FET driver outputs. If the die temperature rises above
this thermal limit, the LTC4010 stops switching and
indicates a fault as previously discussed.
OPERATIO
U
(Refer to Figure 1)
相關(guān)PDF資料 |
PDF描述 |
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| LTC4010CFE#TRPBF | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4011CFE#PBF | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4011CFE#TRPBF | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4050EMS-4.1#PBF | Lithium-Ion Linear Battery Charger Controller with Thermistor Interface; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +125°C |
| LTC4050EMS-4.1#TRPBF | Lithium-Ion Linear Battery Charger Controller with Thermistor Interface; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +125°C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4010CFETR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4010CFETRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4010EFE | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
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