MC34675AEPR2 Freescale Semiconductor, MC34675AEPR2 Datasheet

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MC34675AEPR2

Manufacturer Part Number
MC34675AEPR2
Description
IC BATTERY CHARGER 28V 8-UDFN
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC34675AEPR2

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
2.6 V ~ 6.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-UDFN
Product
Charge Management
Output Voltage
4.2 V
Output Current
1000 mA
Operating Supply Voltage
2.6 V to 6.6 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Freescale Semiconductor
Advance Information
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2008. All rights reserved.
28V-Input-Voltage Single-Cell
Li-Ion Battery Charger with
10mA Regulator
4.85V/10mA linear regulator. The high input voltage, up to 28V,
eliminates the input over-voltage protection circuit required in handheld
devices such as cell phones, Bluetooth accessories, and portable
media players. The 4.85V linear regulator is capable of 10mA output
current and can be used to directly power a sub-system such as a USB
transceiver.
(CC) and constant-voltage (CV) charge modes. The CC mode current
is programmable up to 1A, with an external resistor. The voltage across
the external resistor is also used to monitor the actual charge current.
The constant voltage is fixed at 4.2V with 0.7% accuracy over the
-40°C to 85°C temperature range. The trickle-mode current is pre-set
to 20% of the CC mode current when the battery voltage is lower than
the trickle-mode threshold. The end-of-charge (EOC) current threshold
is pre-set to 10% of the CC mode current, to save board space and
cost. A charge current thermal foldback feature limits the charge
current when the IC internal temperature rises to the preset threshold
of 120°C. The 34675 also protects the system with its input over-
voltage protection (OVP) feature. Two indication pins (PPR and CHG)
can be simply interfaced to a microprocessor or LEDs. When no power
supply is connected, or when disabled, the charger draws less than
1.0μA leakage current from the battery.
Features
The 34675 is a high-input-voltage Li-Ion battery charger with a
The charge cycle of the 34675 includes trickle, constant-current
• No external MOSFET, reverse-blocking diode, or current-sense resistor is required
• Guaranteed maximum 1A programmable CC mode current
• ±0.7% voltage accuracy over -40°C to 85°C
• ±6% current accuracy over -40°C to 85°C
• 4.85V/10mA linear regulator with a 6.8V input over-voltage protection threshold
• 28V maximum voltage for the power input with a 6.8V over-voltage protection threshold
• Trickle charge for fully discharged batteries
• Charge current monitor
• Charge current thermal foldback
• Pb-free packaging designated by suffix code EP
V
IN
Figure 1. 34675 Simplified Application Diagram
ON
C
OFF
IN
PPR
EN
GND
CHG
VIN
34675
ISET
BAT
DET
MC34675AEP/R2
Device
R
ISET
ORDERING INFORMATION
POWER MANAGEMENT IC
C
C
DET
EP SUFFIX (PB-FREE)
OUT
98ASA10774D
34675
8-PIN UDFN
Document Number: MC34675
Temperature
-40°C to 85°C
Range (T
TO BATTERY
TO SYSTEM
A
)
Rev. 3.0, 4/2008
Package
8-UDFN

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MC34675AEPR2 Summary of contents

Page 1

... Pb-free packaging designated by suffix code Figure 1. 34675 Simplified Application Diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2008. All rights reserved. Device MC34675AEP/R2 34675 VIN BAT ...

Page 2

... Figure 2. 34675 Simplified Internal Block Diagram 34675 2 INTERNAL BLOCK DIAGRAM VIN Monitor – + Internal V Supply Charge Control – REF + VIN + – + Die – – Temp BAT 120°C + Logic + Control – GND BAT REF ISET REF I EOC Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 3

... GND Ground 6 DET Output 7 ISET Output 8 BAT Output EPAD EPAD N/A Analog Integrated Circuit Device Data Freescale Semiconductor PIN CONNECTIONS EPAD Figure 3. 34675 Pin Connections Formal Name The power supply input. Input supply Indication of the input power status. Open drain output. ...

Page 4

... V DET ± V 2000 ESD ± 200 T - -40 to 150 J T -65 to +150 STG R 10 θ θJA Note 4 T PPRT = 100pF 1500Ω), and the Machine Model ZAP Analog Integrated Circuit Device Data Freescale Semiconductor Unit V V °C °C °C/W °C ...

Page 5

... Refer to the Power-on-Reset parameter for V 6. Supply current does not include the current delivered to the battery through the BAT pin. 7. Not tested. The accuracy is guaranteed by design. Analog Integrated Circuit Device Data Freescale Semiconductor = 5V, -40°C ≤ T ≤ 85° 1.0μ Symbol ...

Page 6

... T = 25°C under nominal IN A Min Typ Max Unit 2.6 2.7 2 100 150 mV 4.075 4.100 4.125 4.6 4.85 5 150 kΩ - 200 - 1 0.5 V μA - 2.0 7 μ 1.0 100 120 140 °C Analog Integrated Circuit Device Data Freescale Semiconductor 1), ...

Page 7

... Characteristics noted under conditions V unless otherwise noted. Typical values noted reflect the approximate parameter means at V conditions, unless otherwise noted. Characteristic END OF CHARGE EOC Filter Time OSCILLATOR Oscillation Frequency Analog Integrated Circuit Device Data Freescale Semiconductor = 5V, -40°C ≤ T ≤ 85° 1μ Symbol t ...

Page 8

... ISET Ω R =7.9 k ISET Ω R =15.8 k ISET 4.0 4.5 5.0 5.5 6.0 6.5 7.0 Input Voltage ( 3.7V 25°C BAT A Ω R =3.95 k ISET Ω R =7.9 k ISET Ω R =15.8 k ISET Input Voltage ( 2.0V 25°C BAT A Analog Integrated Circuit Device Data Freescale Semiconductor 5 7 ...

Page 9

... Charge Current (mA) Figure 12 Charge Current ISET V = 5.0V 25° Analog Integrated Circuit Device Data Freescale Semiconductor 5 Ω Ω =7 Ω =15 Figure 13. DET Pin Output Voltage vs Input Voltage R 5.00 4.95 4.90 4.85 4 ...

Page 10

... V BAT Ω R =3.95k ISET Ω R =7.9k ISET Ω R =15.8k ISET - Temperature (° 5.0V 2.0V IN BAT - Temperature (°C) Figure 20 Temperature ISET V = 5.0V 3.7V IN BAT - Temperature (°C) Figure 21 Temperature DS(ON) = 4.0V 500mA 400mA CHG BAT Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 11

... Temperature (°C) Figure 23. BAT Pin Supply Current vs Temperature V = 4.2V, VIN Pin Not Powered or Charger Disabled BAT Analog Integrated Circuit Device Data Freescale Semiconductor 2500 2000 1500 1000 500 -40 Figure 24. VIN Pin Supply Current vs Temperature 5.00 4.95 4.90 4 ...

Page 12

... Exposed pad. This must be soldered to the large ground plane on the PCB to enhance the thermal conductivity. The pad must be connected to GND electrically programmed by connecting CHG , between this pin and ground. When ISET ⋅ CHG is the CHG is the voltage of the ISET Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 13

... Current Setting & Monitor This block sets the charge current in the constant-current mode, and monitors the actual charge current during the whole charge cycle. Analog Integrated Circuit Device Data Freescale Semiconductor Charge Control End of Charge VIN - BAT Comparator Logic Logic Control Status Indication Sensing & ...

Page 14

... If the Input Voltage Monitor detects that the input voltage is lower than the POR or higher than the OVP threshold, the linear regulator is disabled. No other signal can control the linear regulator. Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 15

... I = CHG R ISET Analog Integrated Circuit Device Data Freescale Semiconductor OPERATIONAL MODES After the charge cycle is completed, the 34675 continues to regulate and monitor the output to 4.2V load is connected in parallel with the battery, the 34675 will ensure that the charger continues to supply the charge current, even if the charge cycle is completed ...

Page 16

... DET pin and ground for the stability of the linear regulator. is applied and the voltage is above the power- ), the PPR pin outputs a low POR 28, where the V and V PORR PORF and V OVPR OVPF Analog Integrated Circuit Device Data Freescale Semiconductor are the are ...

Page 17

... EN=high or V >V IN OVP or V < BAT OS V < 2.7V BAT V BAT FAST CHARGE Charger <4.10V BAT Analog Integrated Circuit Device Data Freescale Semiconductor V OVPF 4.85V V PORF CHARGE STATE DIAGRAM Charger: OFF V >V IN POR SHUTDOWN Charger: OFF EN=low and V <V IN OVP and V >V +V ...

Page 18

... USB transceiver, that require a voltage higher than 4.5V. Figure 30 is the typical application circuit. BAT Li+ 2.2µF 100K MC34675 CHG PPR EN OFF ON DET 0.22µF is DS(ON 100K MCU USB Xcvr Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 19

... For the most current package revision, visit www.freescale.com and perform a keyword search using the “98A” listed below. Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGING PACKAGE DIMENSIONS EP SUFFIX 8-PIN 98ASA10774D REVISION 0 PACKAGING PACKAGE DIMENSIONS 34675 19 ...

Page 20

... PACKAGING PACKAGING DIMENSIONS (CONTINUED) PACKAGING DIMENSIONS (CONTINUED) 34675 20 EP SUFFIX 8-PIN 98ASA10774D REVISION 0 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 21

... PACKAGING DIMENSIONS (CONTINUED Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGING DIMENSIONS (CONTINUED EP SUFFIX 8-PIN 98ASA10774D REVISION 0 PACKAGING 34675 21 ...

Page 22

... PACKAGING 34675 22 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 23

... REVISION DATE DESCRIPTION OF CHANGES 4/2008 • Initial Release 1.0 4/2008 • Added Tape & Reel positioning drawing 2.0 4/2008 • Deleted Tape & Reel positioning drawing 3.0 Analog Integrated Circuit Device Data Freescale Semiconductor REVISION HISTORY REVISION HISTORY 34675 23 ...

Page 24

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer ...

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