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参数资料
| 型号： | LTC4006EGN-6#TR |
| 厂商： | Linear Technology |
| 文件页数： | 6/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHGR CC/CV LI-ION 16SSOP |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
LTC4006
PI FU CTIO S
R T (Pin 4): Timer Resistor. The timer period is set by
placing a resistor, R RT , to GND.
The timer period is t TIMER = (1hour ? R RT /154k)
If this resistor is not present, the charger will not start.
GND (Pin 5): Ground for low power circuitry.
NTC (Pin 6): A thermistor network is connected from NTC
to GND. This pin determines if the battery temperature is
safe for charging. The charger and timer are suspended if
the thermistor indicates a temperature that is unsafe for
charging. The thermistor function may be disabled with a
300k to 500k resistor from DCIN to NTC.
I TH (Pin 7): Control Signal of the Inner Loop of the Current
Mode PWM. Higher I TH voltage corresponds to higher
charging currrent in normal operation. A 6.04k resistor, in
series with a capacitor of at least 0.1 μ F to GND, provides
loop compensation. Typical full-scale output current is
40 μ A. Nominal voltage range for this pin is 0V to 3V.
I MON (Pin 8): Current Monitoring Output. The voltage at
this pin provides a linear indication of charging current.
Peak current is equivalent to 1.19V. Zero current is ap-
proximately 0.309V. A capacitor from I MON to ground is
required to filter higher frequency components. If V BAT <
2.5V/cell, then V(I MON ) = 1.19V when conditioning a
depleted battery. Any current sourced or sinked from this
pin directly affects the charging current accuracy. If this
CSP (Pin 9): Current Amplifier CA1 Input. This pin and the
BAT pin measure the voltage across the sense resistor,
R SENSE , to provide the instantaneous current signals re-
quired for both peak and average current mode operation.
BAT (Pin 10): Battery Sense Input and the Negative
Reference for the Current Sense Resistor. A precision
internal resistor divider sets the final float potential on this
pin. The resistor divider is disconnected during shutdown.
CLP (Pin 11): Positive Input to the Supply Current Limiting
Amplifier, CL1. The threshold is set at 100mV above the
voltage at the CLN pin. When used to limit supply current,
a filter is needed to filter out the switching noise. If no
current limit function is desired, connect this pin to CLN.
CLN (Pin 12): Negative Reference for the Input Current
Limit Amplifier, CL1. This pin also serves as the power
supply for the IC. A 10 μ F to 22 μ F bypass capacitor should
be connected as close as possible to this pin.
TGATE (Pin 13): Drives the top external P-channel MOSFET
of the battery charger buck converter.
PGND (Pin 14): High Current Ground Return for the BGATE
Driver.
BGATE (Pin 15): Drives the bottom external N-channel
MOSFET of the battery charger buck converter.
INFET (Pin 16): Drives the Gate of the External Input PFET.
pin is to be monitored, a high impedance input buffer
should be used.
TEST CIRCUIT
LTC4006
11.67 μ A
+
V REF
+
35mV
–
3k
–
EA
10
BAT
9
CSP
7
I TH
+
LT1055
–
0.6V
4006 TC
4006fa
6
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