SC802 SEMTECH [Semtech Corporation], SC802 Datasheet
SC802
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SC802 Summary of contents
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... The output voltage to the battery is controlled to within 1% of the programmed voltage for either 4.1V or 4.2V. The SC802 can also function as a general purpose cur- rent source current source for charging nickel- cadmium (NiCd) and nickel-metal-hydride (NiMH) batter- ies using NTC termination. ...
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... SC802/SC802A ...
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... VPRGM = External Divider VCC = 4.2V - 6.5V Adjust Mode V = 0.1V VPRGM Refgnd - Agnd = 30mV Refgnd = 0V SC802 Rterm = 3.01kΩ SC802 Rterm = 3.01kΩ IPRGM = 3.01kΩ VBATTERY = 3.8V IPRGM = 3.01kΩ V(AFC) = 0.75V SC802A Rterm = 976Ω SC802A Rterm = 976Ω IPRGM = 1.78kΩ VBATTERY = 3.8V Rterm = 976Ω ...
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... CHRGB Charge LED On V CHRGB Charge LED Off I CHRGB CPB LED On V CPB LED Off BIPB, VPRGM Inputs 2005 Semtech Corp. Conditions SC802 Disable NTCDIS NTC Hot Vth, VCC = 5V NTCH NTC Cold Vth, VCC = 5V NTCC NTC Enable, VCC = 5V NTCEN Hot/Cold Vth hysteresis NTHYS V < ...
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... SC802/SC802A ( ) ...
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... Pre-Charge Ref Pre-Charge Ref Control Control Control Pre-Charge On Pre-Charge On Fast-Charge On Fast-Charge On Charge/LDO Charge/LDO On On GND GND 6 SC802/SC802A ...
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... AFC pin as described below. Analog Fast Charge (AFC Pin) Many applications require more than one current setting for Fast Charge. This feature is included in the SC802 by using the AFC function. When the AFC pin is con- nected to VCC the device behaves as described in the previous section ...
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... If the battery is not in place the device can enter the ⎠ LDO mode. In this mode the SC802 will act like a low TERM dropout regulator. The output voltage is set to 4.1V, 4.2V or externally set by a resistor divider. See the section titled “Configuring the output voltage to the battery” for setting an output voltage ...
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... There are five fault modes detected by the SC802; (In- put under voltage, input over voltage, NTC temperature, Max die temperature or OT and pre-charge timeout) The LED states for these fault modes are shown below. ⎞ = ⎟ ...
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... R4 C1 π × 2 100 kHz When the SC802 is in Adjust mode the VCC is required to be 150mV > Vout. Internal protection circuits will dis- able the output if VOUT approaches VCC. © 2005 Semtech Corp. SC802 14 11 VCC CPB 13 10 VCC ...
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... PRELIMINARY State Diagram Over Voltage, Under Over Voltage, Under Voltage, or Over Voltage, or Over Temperature will force Temperature will force the SC802 into the SC802 into Shutdown Mode from Shutdown Mode from any state. any state. Start LDO Mode Start LDO Mode Iout< ...
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... R1 10K JP3 LDO TP8 RGND Marking Information 802 yyww Top view. Marking for the SC802 MLP 16 Lead package: yyww Date Code (Example: 0012) © 2005 Semtech Corp Pop VCC CPB 13 10 VCC CHRGB 3 12 ...
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... Typical Characteristics Output Current -vs- Rprgm 2 1.5 1 0.5 0 Resistance (Kohm ) Fast Charge Drop-out Voltage -vs- Output Current Output Current ( dropout 4.4 4.2 4 3.8 3.6 3.4 3 CHARGE © 2005 Semtech Corp. SC802 (non-A) Output Current -vs- Rterm 250 200 150 100 50 0 0.8 1.5 2.5 3.5 4.5 700 8 600 500 6 400 4 300 200 2 100 ...
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... Fast Charge IOUT Soft Start CC-mode CPB CHRGB TIMER (Disabled) NTC © 2005 Semtech Corp. Charge Mode Timing Re-Charge Termination Threshold Current CV-mode On Off On LDO-Mode Timing Re-Charge Termination Threshold Current CV-mode Load Current Transient On Off Off 14 SC802/SC802A On Off On Hold On Fault On Fault www.semtech.com ...
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... Semtech Corp. DIM aaa bbb A2 SEATING PLANE C D1 e/2 LxN E bxN bbb D/2 15 SC802/SC802A DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX - - .031 .040 0.80 1. .000 .002 0.00 0.05 (.008) (0.20 .010 .012 .014 0.25 0.30 ...
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... Contact Information © 2005 Semtech Corp. DIM Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 16 SC802/SC802A DIMENSIONS INCHES MILLIMETERS (.152) (3.85) .114 2.90 .091 2.30 .091 2.30 .026 0.65 .016 0.40 .037 0.95 .189 4.80 ...