Richtek RT9471DGQW User manual

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20231http://www.richtek.com
your power partner.
3A Single Cell Switching Battery Charger Evaluation Board
General Description
The RT9471D is a highly-integrated 3A switch mode battery charge management and system power path
management device for single cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-
mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C
serial interface with charging and system settings makes the device a truly flexible solution.
Table of Contents
General Description ......................................................................................................................................................1
Performance Sepcification Summary ...........................................................................................................................2
Power-up Procedure .....................................................................................................................................................2
Detailed Description of Hardware .................................................................................................................................3
Bill of Materials..............................................................................................................................................................5
Typical Applications ......................................................................................................................................................6
Evaluation Board Layout...............................................................................................................................................9
More Information.........................................................................................................................................................13
Important Notice for Richtek Evaluation Board...........................................................................................................13

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20232http://www.richtek.com
your power partner.
Performance Sepcification Summary
Summary of the RT9471D Evaluation Board performance specificiaiton is provided in Table 1. The ambient
temperature is 25°C.
Table 1. RT9471D Evaluation Board Performance Specification Summary
Specification
Test Conditions
Min
Typ
Max
Unit
Input Voltage Range, VBUS
3.9
--
13.5
V
Maximum Input Current, IBUS
0
--
3.2
A
Maximum Input Current, IBUS
VBUS ≥12V
--
--
2
A
Maximum Output Current, ISYS
--
--
3.2
A
Maximum Battery Voltage, VBAT
--
--
4.7
V
Maximum Charge Current, IBAT
--
--
3.15
A
Maximum Discharge Current, IBAT
--
--
6
A
Power-up Procedure
Suggestion Required Equipments
⚫RT9471D Evaluation Board
⚫DC power supply x 2, one for VBAT, one for VBUS
⚫Electronic load
⚫Oscilloscope
Quick Start Procedures
The Evaluation Board is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on
supplies until all connections are made.
Proper measurement equipment setup and follow the procedure below.
1. Set power source equal 3.8V/5A then connect to BAT and GND of EVB.
2. Use E-Load connect to power source and enable CC loading from power source.
3. The AP connect to SCL, SDA and GND of EVB
4. Check I2C can work normally by connecting to slave address (0x53).
5. Set VBUS = 5V/3A and connect to VBUS and GND of EVB.
6. Check have charging current to VBAT.
7. Check 0x0F[3:0] shows ‘0100’ (Fast-charge)
8. Start the test by changing register setting which you want.

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20233http://www.richtek.com
your power partner.
Detailed Description of Hardware
Headers Description and Placement
Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and
then make sure all the components are undamaged and correctly installed. If there is any missing or
damaged component, which may occur during transportation, please contact our distributors or e-mail us at
[email protected]om.
Test Points
The EVB is provided with the test points and pin names listed in the table below.
Test Point/
Pin Name
Function
VBUS
Input voltage.
SYS
System voltage.
BAT
Battery voltage.
SW
Switching node.
REGN
Internal LDO.

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20234http://www.richtek.com
your power partner.
Test Point/
Pin Name
Function
PMID
PMID from VBUS.
BTST
Boost strap pin.
INT
Interupt pin.
SDA
I2C SDA.
SCL
I2C SCL.
/QON
Power key.
VAC
Input sense.
/CE
Charger enable or disable.
D+
Positive of USB data line.
D-
Negative of USB data line.
TS
Temperature sense voltage.

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20235http://www.richtek.com
your power partner.
Bill of Materials
Reference
Count
Part Number
Description
Package
Vendor
C1
1
GRM155R61E105KA12
1µF/25V/X5R/0402
0402
Murata
C3
1
GRM155R60J475ME47
4.7µF/6.3V/X5R/0402
0402
Murata
C4
1
GRM033R61C473KE84
47nF/16V/X5R/0201
0201
Murata
C5, C6, C7
2
GRM185R60J106ME15
10µF/6.3V/X5R/0603
0603
Murata
C10
1
GRM188R61E106MA73
10µF/25V/X5R/0603
0603
Murata
J102
1
HSEC8-110-01-S-DV-A-TR
CONN EDGE DUAL FMALE
20POS 0.8mm
12.6x7.98mm
SAMTEC
L1
1
CIGT252010EH1R0MNE
1µH
L-2-5x2-0
Samsung
LED1,
LED2
2
LNL-302RD000A1
LED_RED-DIP
LED-3-85MMDIP
LighTop
PD1
1
121U-3CST-09CR
USB TYPE-C 3.1
9.87x9.75mm
JEM
POWER
ON
1
HTS6601H
SW-TACT-SWITCH
TACT-BTN
High-Tronics
R3, R6,
R11, R12
4
WR06X1002FTL
10k/0603
0603
WALSIN
R8
1
WR06X4701FTL
4.7k/0603
0603
WALSIN
R9
1
WR06X5231FTL
5.23k/0603
0603
WALSIN
R10
1
WR06X3012FTL
30.1k/0603
0603
WALSIN
R21, R22
2
WR06X2001FTL
2k/0603
0603
WALSIN
U1
1
RT9471DGQW(2)
RT9471DGQW(2)
WQFN-24L 4x4
RichTek
USB2
1
UMMBF-051MGCB2-
CF1066
MICRO USB AB TYPE, SMT
7.4x5.63mm
Cherng Weei

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20236http://www.richtek.com
your power partner.
Typical Applications
EVB Schematic Diagram
1. The capacitance values of the input and output capacitors will influence the input and output voltage ripple and
stability.
2. MLCC capacitors have degrading capacitance at DC bias voltage, and especially smaller size MLCC capacitors
will have much lower capacitance.
JP34
GPIO
11 22
PD1
USB TYPE-C 3.1
GND
A12
RX2+
A11
RX2-
A10
VBUS1
A9
SBU1
A8
D1-
A7
D1+
A6
CC1
A5
VBUS2
A4
TX1-
A3
TX1+
A2
GND2
A1
B1
GND3
TX2+ B2
TX2- B3
VBUS3 B4
CC2 B5
D2+ B6
D2- B7
SBU2 B8
VBUS4 B9
RX1- B10
RX1+ B11
GND4 B12
Shell1
29
Shell2
30
Shell3
31
Shell4
32
S1 25 S2 26
S3 27
28
S4
NP1
33 34
NP2
VBUSVBUS
VBUS VBUS
D-
D- D+
D+
GPIO
TP4
BATI
1
GP17 PGND 1
GP18 PGND 1
GP15 PGND 1
R6
12
R2
1
2
R7
12
CP2
CP-0805C_1 PGND
U1
PSEL/D+
2
/PG/D-
3
SCL
5
INT
7
/CE
9
TS
11
PGND 17
VAC
1
BAT 13
NC
8
SDA
6
NC
10
STAT
4
VBUS
24
PMID 23
BTST 21
SW 20
SW 19
REGN 22
SYS 16
SYS 15
/QON
12
BAT 14
PGND 18
PGND 25
INT
GP20 PGND 1
JP5
VBUS_SENSE
11
22
8 mil
AZ7
NC
1 2
GND_SENSE
VBUS_SENSE AZ12
NC
1 2
8 mil
differential
pair
GP4
VBUS
1
GP21 PGND 1
JP8
CE 11
22
INT
TP13
INT 1
TP15
CE 1CE
VBAT_SENSE
STAT
GND_SENSE
BTST
TP21
BTST 1BTST
CP3
CP-0805C_1
C3
1 2
8 mil
8 mil differential
pair
VSYS_SENSE
GND_SENSE
differential
pair
8 mil
8 mil
AZ10
NC
1 2
AZ11
NC
1 2
JP17
VSYS_SENSE
1
1
2
2
D+/PSEL
C4
1 2
JP12
TS
1
1
2
2
TP8
D-/PG 1
TP9
D+/PSEL 1
D-/PG
SW
TP10
SW 1
R3
1
2
AZ9
NC
1 2
SCL
CE
JP13
REGN
1
1
2
2
REGN
PowerOn
SW-TACT-SWITCH
1
12
2
33 4
4
TS
QON
SDA
REGN
PMID
AZ8
NC
1 2
KA
LED1
LED_RED-DIP
A
K
R21
12
SDA
TP18
TS 1
GP2
PULL-UP
1
PULL-UP
SCL
TP5
STAT 1
TS
TP16
RENG 1REGN
SW
PG
KA
LED2
LED_RED-DIP
A
K
R22
12
JP6
PULL-UP
11
22
33
R8
12
JP33
3V3
11 22
C8
12
3V3
TP19
QON 1QON
JP14
VBAT_SENSE
1
1
2
2
PULL-UP
R1
1
2
STAT
R9
12
SCL
1V8
JP35
1V8
11 22
HI
PSEL
LOW
R12
12
PSEL
REGN
JP16
PSEL H/L
11
22
33
4 mil
R10
12
TP3
SYSI
1
4 mil
4 mil
C10
12
PSEL
USB2
MICRO USB AB TYPE,SMT
11
22
33
44
55
99
66
77
8
8
NC1
JP9
D-/PG
11
22
33
JP4
HEADER-CHEB254S006
1
122
3
344
5
566
PG
D- D-/PG
VBUS
AK
D1
NC/NSR05F40NXT5G
AK
D-
ID
D+
C2
12
TP20
ID
1
TP2
VBUSI
1
D-/PG
C9
12
D2
NC/PTVSHC3N12VU
1
32
VBUS
GP7
BAT
1
C7
12
CP4
CP-0805C_1
J102
CONN EDGE DUAL FMALE 20POS 0.8mm
135
6810121416
9
2
111315 7
4
17
18
19
20
21
22
L1 12
SYSI
JP10
D+/PSEL
11
22
33
SDA
D+
GP14 PGND 1
TP11
SCL 1
TP12
SDA 1
R5
1
2
D+/PSEL
CP5
CP-0805C_1
D+/PSEL
C5
12
C6
12
GP6
SYS
1
C1
12
BATI
GP5
PMID
1
TP1
PMID 1
TS
R23
12
NC2
R11
12
C11
12
C12
12

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20237http://www.richtek.com
your power partner.
Measure Result
Power –Up with VBUS Plug In
Charge Enable
Charge Disable
Boost Start-Up
AICC Enable
Charger Efficiency, VBAT = 3.8V

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20238http://www.richtek.com
your power partner.
Charger Efficiency, VBAT = 4.2V
Boost Efficiency

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 20239http://www.richtek.com
your power partner.
Evaluation Board Layout
Figure 1 to Figure 4 are RT9471D Evaluation Board layout.
Figure 1. Top View (1st layer)

RT9471DGQW(2)
Evaluation Board
EVB_RT9471DGQW(2)-00 June 202310 http://www.richtek.com
your power partner.
Figure 2. PCB Layout—Inner Side (2nd Layer)