Rechargeable lithium-chip IT
IT CHK0501 IT CHK0501
. 1. 2. , 3. ,
:Iconst Ipre Ifull Vconst Vmin 、 z
、、、、 LED ; z 30V ,, ; www.DataS...
Description
IT CHK0501 IT CHK0501
. 1. 2. , 3. ,
:Iconst Ipre Ifull Vconst Vmin 、 z
、、、、 LED ; z 30V ,, ; www.DataSheet4U.com z 8PIN ,,,, ; z , ,.
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IT CHK0501
1. SOP8 & SSOP8
1 2 3 4 VSS CS LED BAT VCC DRC LV VT
8 7 6 5
IT CHK0501
2.
1 2 3 4 5 6 7 VSS LED VCC DRC VT LV BAT
, LED
CS , 8 3. z 、、: Vmin , Vmin Iconst , Vconst ,(Iconst 10%,) ,LED ,,; z 、: BAT Vmin ,, Iconst 10%; VT 10%Vcc , Iconst 10%; z : ,VT 90%Vcc ,。VT 90%Vcc ,; , VT , 10%VCC; ; z LED : (),、(≈90%), (≥90%)、,(, www.DataSheet4U.com ) ; z PFM ,; z , 20V,; z :、。
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2
IT CHK0501
4. 5. * LED LED IC Vref Iconst Ipre Ifull Idrc Iled Fled Vmin Vvt Vvt Vvt Is 210mV/R 11.5 mV/R 11.5 mV/R 50 10 0.5 0.9 2.675 235mV/R 23.5 mV/R 23.5 mV/R 100 1.0 >0.9Vcc <0.1Vcc <0.01Vcc 265mV/R 35 mV/R 35 mV/R 2 1.1 350 V mA mA mA mA mA Hz V V V V uA Vcc Vin Voc Vio Iio Tj 3 -0.5 -25 5 30 7 Vcc+0.5 10 500 85 V V V mV nA ℃
*,。 6.
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LED
1KHz 1
()
()
+
::、。
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3
IT CHK0501
7. ,,,, 。,,, 、。
VCC Q3
L1 D1 D4 C4
VCC
R2
Q1
DC 5~7V
R3 R15 Q2 VCC R7 R4 D2 green 1 2 VCC 3 R5 red 4 GND LED VDD DRC CS BAT LV VT 8 7 6 R8 5 R10 VCC IC1 R13 R6
C3 C2 C5
R9 R11
BT1 R14
R12
1: PFM : 1、PMOS 2、,VT 3、≤7V,7V,ICVDD7V 4、R6、R7、R8、R9 5、 6、(Vbat):Vbat=Vref*(R6+R7+R8+R9)/(R8+R9) 7、(Vlow):Vlow=Vmin*(R6+R7+R8+R9)/R9 8、R12 9、(Ibat):Ibat=Iconst/R12 10、R11 11、RTR10, 12、PCBC2IC
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