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參數(shù)資料
| 型號： | LT1512CS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CAP 220PF 250VAC CERAMIC Y2/X1 |
| 中文描述： | 2.7 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 261K |
| 代理商： | LT1512CS8 |
5
LT1512
PI
FU
CTIO
N
S
U
U
be connected directly to the GND S pin or to the ground
plane close to the point where the GND S pin is connected.
V
SW
:
The switch pin is the collector of the power switch,
carrying up to 1.5A of current with fast rise and fall times.
Keep the traces on this pin as short as possible to minimize
radiation and voltage spikes. In particular, the path in
Figure 1 which includes SW to C2, D1, C1 and around to
the LT1512 ground pin should be as short as possible to
minimize voltage spikes at switch turn-off.
–
+
I
FBA
I
FB
S/S
FB
5k
62k
0.08
–
+
–
EA
V
C
V
IN
GND
1512 F02
GND S
1.245V
REF
500kHz
OSC
SYNC
SHUTDOWN
DELAY AND RESET
LOW DROPOUT
2.3V REG
ANTI-SAT
LOGIC
DRIVER
SW
SWITCH
–
+
IA
A
V
≈
6
COMP
Figure 2
BLOCK DIAGRA
M
W
OPERATIO
The LT1512 is a current mode switcher. This means that
switch duty cycle is directly controlled by switch current
rather than by output voltage or current. Referring to the
Block Diagram, the switch is turned “on” at the start of each
oscillator cycle. It is turned “off” when switch current
reaches a predetermined level. Control of output voltage
and current is obtained by using the output of a dual
feedback voltage sensing error amplifier to set switch
current trip level. This technique has the advantage of
simplified loop frequency compensation. A low dropout
internal regulator provides a 2.3V supply for all internal
circuitry on the LT1512. This low dropout design allows
input voltage to vary from 2.7V to 25V. A 500kHz oscillator
U
is the basic clock for all internal timing. It turns “on” the
output switch via the logic and driver circuitry. Special
adaptive antisat circuitry detects onset of saturation in the
power switch and adjusts driver current instantaneously to
limit switch saturation. This minimizes driver dissipation
and provides very rapid turn-off of the switch.
A unique error amplifier design has two inverting inputs
which allow for sensing both output voltage and current. A
1.245V bandgap reference biases the noninverting input.
The first inverting input of the error amplifier is brought out
for positive output voltage sensing. The second inverting
input is driven by a “current” amplifier which is sensing
output current via an external current sense resistor. The
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1512CN8 | SEPIC Constant-Current/ Constant-Voltage Battery Charger |
| LT1512C | Octal Bus Transceivers 20-PDIP 0 to 70 |
| LT1512I | Octal Bus Transceivers 20-PDIP 0 to 70 |
| LT1512IN8 | SEPIC Constant-Current/ Constant-Voltage Battery Charger |
| LT1512IS8 | SEPIC Constant-Current/ Constant-Voltage Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1512CS8#PBF | 功能描述:IC BATT CHRGR CONST I/V 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關(guān)文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LT1512CS8#TR | 功能描述:IC CHARGER BATT CONST V/I 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LT1512CS8#TRPBF | 功能描述:IC BATT CHRGR CONST I/V 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LT1512CS8PBF | 制造商:Linear Technology 功能描述:LT1512CS8PBF |
| LT1512I | 制造商:LINER 制造商全稱:Linear Technology 功能描述:SEPIC Constant-Current/ Constant-Voltage Battery Charger |
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