Battery Charger. CN3765 Datasheet

CN3765 Charger. Datasheet pdf. Equivalent

CN3765 Datasheet
Recommendation CN3765 Datasheet
Part CN3765
Description Multi-Chemistry Battery Charger
Feature CN3765; CONSONANCE 4A, Multi-Chemistry Battery Charger CN3765 General Descriptions: The CN3765 is a PWM swi.
Manufacture CONSONANCE
Datasheet
Download CN3765 Datasheet




CONSONANCE CN3765
CONSONANCE
4A, Multi-Chemistry Battery Charger
CN3765
General Descriptions:
The CN3765 is a PWM switch-mode
multi-chemistry battery charger controller in a
small package using few external components.
The CN3765 is specially designed for charging
lithium ionLiFePO4 or Lithium Titanate batteries
with constant current and constant voltage mode.
In constant voltage mode, the regulation voltage is
set by 2 external resistors. The constant charging
current is programmable with a single current sense
resistor.
Deeply discharged batteries are automatically
trickle charged at 17.5% of the programmed
constant charging current until the cell voltage
exceeds 66.5% of constant voltage. The charge
cycle is terminated once the charging current drops
to 16% of full-scale current, and a new charge
cycle automatically restarts if the charge current
rises above 58.8% of full-scale charge current.
CN3765 will automatically enter sleep mode when
input voltage is lower than battery voltage.
Other features include under voltage lockout,
battery over voltage protection, status indication,
etc.
CN3765 is available in a space-saving 10-pin
SSOP package.
Applications:
Hand-held Equipment
Battery-Backup Systems
Portable Industrial and Medical Equipment
Standalone Chargers for Lithium ion,
LiFePO4 or Lithium Titanate Batteries
Features:
Wide Input Voltage: 6.6V to 30V
Complete Charge Controller for Single-
or Multi-cell Lithium ion, LiFePO4 or
Lithium Titanate Batteries
Charge Current Up to 4A
PWM Switching Frequency: 310KHz
Can be used as Voltage Source when
Battery is Absent
Charging Current is programmed with a
current sense resistor
Automatic Conditioning of Deeply
Discharged Batteries
Automatic Recharge
Charging Status Indication
Soft Start
Battery Overvoltage Protection
Operating Ambient Temperature
40to 85
Available in 10-Pin SSOP Package
Pb-free, Rohs-Compliant, Halogen Free
Pin Assignment:
VG 1
GND 2
CHRG 3
DONE 4
COM 5
CN3765
10 DRV
9 VCC
8 CSP
7 BAT
6 FB
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CONSONANCE CN3765
CONSONANCE
Typical Application Circuit:
Input Supply
C1
C2
100nF
M1
D1
*
1 10
VG
9 VCC
DRV
R3
D3 D4
CSP 8
BAT 7
CN3765
FB
6
3 CHRG
COM 5
4 DONE
GND
2
L
D2
R4
120
C4
220nF
RCS
C3
BAT
R1
R2
*: D1 can be omitted, refer to section Diode Selectionon Page 9
Figure 1 Typical Application Circuit
Ordering Information:
Part No.
CN3765
Shipment
Tape and Reel, 3000/Reel
Operating Ambient Temperature
40to 85
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Rev.1.0



CONSONANCE CN3765
CONSONANCE
Pin Description:
Pin No.
1
2
3
4
5
6
7
8
9
10
Name
VG
GND
COM
FB
BAT
CSP
VCC
DRV
Descriptions
Internal Voltage Regulator. VG internally supplies power to gate driver,
connect a 100nF capacitor between VG pin and VCC pin.
Ground. Negative terminal of input supply.
Open-Drain Charge Status Output. When the battery is being charged, this pin
is pulled low by an internal switch. Otherwise this pin is in high impedance state.
Open-Drain Charge Termination Output. When the charging is terminated,
this pin is pulled low by an internal switch. Otherwise this pin is in high
impedance state.
Loop Compensation Input. Connect a 220nF capacitor in series with an 120Ω
resistor from this pin to GND.
Battery Voltage Feedback Input. Generally this Pin is connected to the external
feedback resistor divider to sense the battery voltage.
Negative Input for Charge Current Sensing. This pin and the CSP pin measure
the voltage drop across the sense resistor RCS to provide the current signals
required.
Positive Input for Charge Current Sensing. This pin and the BAT pin measure
the voltage drop across the sense resistor RCS to provide the current signals
required.
External DC Power Supply Input. VCC is also the power supply for internal
circuit. Bypass this pin with capacitors.
Gate Drive Pin. Drive the gate of external P-channel MOSFET.
Absolute Maximum Ratings
Voltage from VCC, VG, DRV, CHRG, DONE to GND………………………...…0.3V to 33V
Voltage from VG to VCC…………………………………...………………8V to VCC0.3V
Voltage from CSP, BAT to GND………..…………………………………………0.3V to 25V
Voltage from COM, FB to GND……………………………….…………………0.3V to 6.5V
Storage Temperature……………………………………………………..…...…65to 150
Operating Ambient Temperature…………………………………………….……40to 85
Lead Temperature(Soldering, 10 seconds)………………………………………….....……260
Stresses beyond those listed under ‘Absolute Maximum Ratings’ may cause permanent damage to the device. These are stress
ratings only and functional operation of the device at these or any other conditions above those indicated in the operational
sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect
device reliability.
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